The Beaked Whales Of The Family Ziphiidae - free ebook by Frederick W. (Frederick William) True

Beaked Whales of the Family Ziphiidæ in the U. S. National Museum

BY FREDERICK W. TRUE Head Curator, Department of Biology, U. S. National Museum WASHINGTON GOVERNMENT PRINTING OFFICE 1910 BULLETIN OF THE UNITED STATES NATIONAL MUSEUM Issued September 28, 1910....

18 minute read

Read Chapter

ADVERTISEMENT.

The scientific publications of the United States National Museum consist of two series, the Proceedings and the Bulletins . The Proceedings , the first volume of which was issued in 1878, are intended primarily as a medium for the publication of original, and usually brief, papers based on the collections of the National Museum, presenting newly-acquired facts in zoology, geology, and anthropology, including descriptions of new forms of animals, and revisions of limited groups. One or two volume

1 minute read

Read Chapter

Genus MESOPLODON Gervais.

Of this genus the National Museum has four specimens; namely, (1) a skull (Cat. No. 21112, U.S.N.M.) obtained at Bering Island, North Pacific Ocean, in 1883, by Dr. L. Stejneger, and made the type of the species M. stejnegeri True; (2) a skull and photographs (Cat. No. 143132, U.S.N.M.) of the same species, from Yaquina Bay, Oregon, obtained in exchange from Mr. J. G. Crawford in 1904; (3) a skeleton, cast, and photographs of a young male (Cat. No. 23346, U.S.N.M.), hitherto supposed to represen

2 minute read

Read Chapter

MESOPLODON BIDENS (Sowerby).

The only specimen from the Atlantic coast of the United States which can with certainty be referred to this species is the one from Nantucket mentioned on page 3. Prof. L. Agassiz’s original notice of it is so brief that it is quoted in full below: Professor Agassiz also brought to the notice of the Society the discovery of a Cetacean, new to America. The skull was exhibited, and its peculiar features pointed out. It was obtained on the coast of Nantucket by Messrs. H. M. and S. C. Martin, of Ro

10 minute read

Read Chapter

MESOPLODON DENSIROSTRIS (Blainville)?

The skull of the specimen from Annisquam, Mass., ( Pl. 1 , fig. 2) is, I regret to say, in rather poor condition. It is broken in the left orbital region, and all the bones, especially those of the beak, are warped by weathering. The proximal extremity of the left premaxilla is lacking and also the tip of the beak. The skull is obviously that of a young animal, as all the sutures are open and the surface of the occipital condyles is pitted, owing to imperfect ossification. Although the dimension

7 minute read

Read Chapter

MESOPLODON EUROPÆUS (Gervais).

This species was based on a single specimen found floating in the English Channel about seventy years ago. An account of the circumstances under which it was found was given by Eugène Deslongchamps in 1866, as follows: The head, which forms the subject of this last note, was given to my father some twenty-five or thirty years ago by Mr. Abel Vautier, a merchant and armorer of our town, who died at Paris two years since. The captain of one of Mr. Vautier’s ships, on his return from a voyage to th

1 minute read

Read Chapter

MESOPLODON STEJNEGERI True.

This species was originally described from a single cranium of a young individual, which was collected by Dr. L. Stejneger on Bering Island, Commander Group, Bering Sea, in 1883. With but a single skull, the characters of the species could not be very satisfactorily defined, and some European cetologists have been inclined to doubt its validity. [30] In 1904, however, another skull was obtained by the National Museum, which made it certain that the species was entirely distinct from M. bidens or

15 minute read

Read Chapter

ZIPHIUS CAVIROSTRIS Cuvier.

It has not seemed to me necessary in the present connection to attempt to cite all the multitudinous names which have been given to this species, especially as those zoologists most competent to judge, including Van Beneden, Flower, and Turner, after detailed consideration, have concluded that but one species of Ziphius , or at most two species, exist at present. [35] Nearly all the skulls in European museums are assigned by the zoologists mentioned to Z. cavirostris proper, but some doubt has b

35 minute read

Read Chapter

BERARDIUS BAIRDII Stejneger.

This species was based by Dr. L. Stejneger on a skull obtained by Mr. N. Grebnitzki in Stare Gavan, on the eastern shore of Bering Island, Commander Group, Bering Sea, in the autumn of 1881. In 1879 a portion of a skull of the same species was found on Bering Island by the Vega expedition, and was made the basis of a new species, B. vegæ , by A. W. Malm, the description of which was published a few months after that of Doctor Stejneger. The National Museum subsequently received another skull fro

5 minute read

Read Chapter

HYPEROÖDON AMPULLATUS (Forster).

The National Museum has one skeleton of this well-known species, somewhat imperfect, which is labeled as having been obtained on the coast of Norway, and was received about the year 1875. Its catalogue number is 14499. This skeleton is about 19 feet long and has the following vertebral formula: C. 7; Th. 9; L. 9; Ca. 19 (+1?) = 44 (or 45). Eight chevrons are attached to the caudal vertebræ, and at least two more were present originally. The fifth thoracic vertebra has no facet on the centrum for

1 minute read

Read Chapter

Plate 1 SKULLS OF MESOPLODON

Fig. 1. Mesoplodon bidens. Skull. Nantucket, Mass. Mus. Comp. Zoölogy, No. 1727. Female, adult. Dorsal aspect. About ¼ nat. size. Extremity of beak defective. 2. Mesoplodon densirostris ? Skull. Annisquam, Mass. Female, young. Boston Society of Natural History. Dorsal aspect. ¼ nat. size. Defective on the left side....

18 minute read

Read Chapter

Plate 2 SKULLS AND TOOTH OF MESOPLODON

Fig. 1. Mesoplodon europæus. Skull. Atlantic City, New Jersey. Male, young. Cat. No. 23346, U.S.N.M. Dorsal aspect. ¼ nat. size. 2. Mesoplodon europæus. Skull. North Long Branch, New Jersey. Female, adult. Mus. Comp. Zoölogy. Dorsal aspect. ¼ nat. size. Distal portion of beak lacking and right frontal region defective. 3. Mesoplodon bidens. Tooth. Nantucket, Mass. Mus. Comp. Zoöl., No. 1727. Nat. size....

25 minute read

Read Chapter

Plate 3 SKULLS OF MESOPLODON STEJNEGERI

Fig. 1. Mesoplodon stejnegeri. Type-skull. Bering Island. Immature. Cat. No. 21112, U.S.N.M. Dorsal aspect. ¼ nat. size. Edges abraded; distal end of beak defective. 2. Mesoplodon stejnegeri. Skull. Yaquina Bay, Oregon. Adult. Cat. No. 143132, U.S.N.M. Dorsal aspect. ¼ nat. size. Proximal end of premaxillæ defective and right nasal lacking....

20 minute read

Read Chapter

Plate 4 SKULLS OF MESOPLODON

Fig. 1. Mesoplodon bidens. Skull. Nantucket, Mass. Female, adult. Mus. Comp. Zoöl. No. 1727. Ventral aspect. About ¼ nat. size. Tip of beak, left pterygoid, and malars defective. 2. Mesoplodon densirostris ? Skull. Annisquam, Mass. Female, young. Boston Society of Natural History. Ventral aspect. ¼ nat. size. Left frontal region defective....

19 minute read

Read Chapter

Plate 5 SKULLS OF MESOPLODON EUROPÆUS

Fig. 1. Mesoplodon europæus. Skull. Atlantic City, New Jersey. Male, young. Cat. No. 23346, U.S.N.M. Ventral aspect. ¼ nat. size. 2. Mesoplodon europæus. Skull. North Long Branch, New Jersey. Female, adult. Mus. Comp. Zoölogy. Ventral aspect. ¼ nat. size. Distal portion of beak lacking, pterygoids, malars, and left frontal and temporal regions defective....

21 minute read

Read Chapter

Plate 6 SKULLS OF MESOPLODON STEJNEGERI

Fig. 1. Mesoplodon stejnegeri. Type-skull. Immature. Cat. No. 21112, U.S.N.M. Ventral aspect. ¼ nat. size. Edges abraded; tip of beak, pterygoids, zygomatic processes, etc., defective. 2. Mesoplodon stejnegeri. Skull. Adult. Cat. No. 143132, U.S.N.M. Ventral aspect. About ¼ nat. size. Pterygoids and left malar defective....

18 minute read

Read Chapter

Plate 7 SKULLS OF MESOPLODON

Fig. 1. Mesoplodon bidens. Skull. Nantucket, Massachusetts. Female, adult. Mus. Comp. Zoöl. No. 1727. Lateral aspect. ¼ nat. size. Tip of beak, left pterygoid and malar defective. 2. Mesoplodon densirostris ? Skull. Annisquam, Massachusetts. Female, young. Boston Soc. Nat. Hist. Lateral aspect. ¼ nat. size. Distal portion of beak defective and warped....

20 minute read

Read Chapter

Plate 8 SKULLS OF MESOPLODON EUROPÆUS

Fig. 1. Mesoplodon europæus. Skull. Atlantic City, New Jersey. Male, young. Cat. No. 23346, U.S.N.M. Lateral aspect. About ¼ nat. size. 2. Mesoplodon europæus. Skull. North Long Branch, New Jersey. Female, adult. Mus. Comp. Zoöl. Lateral aspect. About ¼ nat. size. Distal portion of beak lacking....

19 minute read

Read Chapter

Plate 9 SKULLS OF MESOPLODON STEJNEGERI

Fig. 1. Mesoplodon stejnegeri. Type-skull. Bering Island. Immature. Cat. No. 21112, U.S.N.M. Lateral aspect. About ¼ nat. size. Premaxillæ, maxillæ, frontals, zygomatic process, etc., defective. On account of these defects and the immaturity of the individual the forward inclination of the supraoccipital is much greater than in the skull shown in fig. 2. 2. Mesoplodon stejnegeri. Skull. Yaquina Bay, Oregon. Adult. Cat. No. 143132, U.S.N.M. Lateral aspect. ¼ nat. size. Proximal end of premaxillæ

27 minute read

Read Chapter

Plate 10 SKULLS OF MESOPLODON

Skulls of Mesoplodon . Fig. 1. Mesoplodon bidens. Nantucket, Massachusetts. 2. Mesoplodon densirostris ? Annisquam, Massachusetts. 3. Mesoplodon europæus. Atlantic City, New Jersey. 4. Mesoplodon europæus. North Long Branch, New Jersey. 5. Mesoplodon stejnegeri. Type-skull. Bering Island. 6. Mesoplodon stejnegeri. Yaquina Bay, Oregon. Posterior aspect. All figures ¼ nat. size....

22 minute read

Read Chapter

Plate 11 MANDIBLES OF MESOPLODON

Mandibles of Mesoplodon . Figs. 1, 2, and 5. Mesoplodon bidens. Nantucket, Massachusetts. 3 and 6. Mesoplodon europæus. Atlantic City, New Jersey. 4. Mesoplodon stejnegeri. Yaquina Bay, Oregon. All figures ⅕ nat. size....

16 minute read

Read Chapter

Plate 12 MANDIBLE AND TEETH OF MESOPLODON STEJNEGERI

Fig. 1. Mesoplodon stejnegeri. Yaquina Bay, Oregon. Mandible and tooth. ¼ nat. size. 2. The same. Left mandibular tooth. Outer surface. 3. The same. Right mandibular tooth. Inner surface. All figures a little more than ⅗ nat. size....

18 minute read

Read Chapter

Plate 13 SKELETON AND LUNGS OF MESOPLODON EUROPÆUS

Mesoplodon europæus. Atlantic City, New Jersey. Cat. No. 23346, U.S.N.M. Fig. 1. Vertebræ, from right to left as follows: 7th thoracic, 8th thoracic, 1st lumbar, 1st caudal. Scale, 1/3.7 nat. size. 2. Sternum. Anterior aspect. 3. Left scapula. External surface. Scale 1/3.6 nat. size. 4. Right pectoral limb. External surface. Scale 1/3.7 nat. size. 5. Lungs. Dorsal aspect. About 1/8 nat. size....

24 minute read

Read Chapter

Plate 14 SKULLS OF ZIPHIUS CAVIROSTRIS

Ziphius cavirostris. Fig. 1. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Female, young. Cat. No. 21975, U.S.N.M. Dorsal aspect. ⅙ nat. size. Tip of beak slightly defective. 2. Skull. Barnegat City, New Jersey. Female, adult. Cat. No. 20971, U.S.N.M. Dorsal aspect. ⅙ nat. size....

18 minute read

Read Chapter

Plate 15 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. Bering Island. (Topotype of Ziphius grebnitzkii .) Female (?), adult, Cat. No. 22069, U.S.N.M. Dorsal aspect. ⅙ nat. size. 2. Skull. Bering Island. (Topotype of Ziphius grebnitzkii .) Dorsal aspect. Cat. No. 21246. ⅙ nat. size....

16 minute read

Read Chapter

Plate 16 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. (Type of Ziphius grebnitzkii Stejneger.) Bering Island. Male (?). Cat. No. 20993, U.S.N.M. Dorsal aspect. ⅙ nat. size. 2. Skull. (Topotype of Ziphius grebnitzkii .) Bering Island. Adult. Cat. No. 21245, U.S.N.M. Dorsal aspect. ⅙ nat. size....

17 minute read

Read Chapter

Plate 17 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. (Topotype of Ziphius grebnitzkii .) Bering Island. Male (?), adult. Cat. No. 21248, U.S.N.M. Dorsal aspect. ⅙ nat. size. 2. Skull. Newport, Rhode Island. Male, adult. Cat. No. 49599, U.S.N.M. Dorsal aspect. ⅙ nat. size....

15 minute read

Read Chapter

Plate 18 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Ventral aspect. ⅙ nat. size. 2. Skull. Barnegat City, New Jersey. Ventral aspect. ⅙ nat. size....

13 minute read

Read Chapter

Plate 19 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. (Type of Ziphius grebnitzkii .) Bering Island. Cat. No. 20993, U.S.N.M. Ventral aspect. ⅙ nat. size. 2. Skull. Newport, Rhode Island. Ventral aspect. ⅙ nat. size....

13 minute read

Read Chapter

Plate 20 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Cat. No. 21975, U.S.N.M. Lateral aspect. ⅙ nat. size. 2. Skull. Barnegat City, New Jersey. Lateral aspect. ⅙ nat. size. 3. Skull. (Type of Ziphius grebnitzkii Stejneger.) Bering Island. Cat. No. 20993, U.S.N.M. Lateral aspect. ⅙ nat. size....

20 minute read

Read Chapter

Plate 21 SKULLS OF ZIPHIUS CAVIROSTRIS

Fig. 1. Skull. Newport, Rhode Island. Lateral aspect. 1/7 nat. size. 2. Skull. (Type of Ziphius semijunctus (Cope).) Charleston, South Carolina. Posterior aspect. 1/7 nat. size. 3. Skull. Barnegat City, New Jersey. Posterior aspect. 1/7 nat. size. 4. Skull. (Topotype of Ziphius grebnitzkii Stejneger.) Posterior aspect. 1/7 nat. size. 5. Skull. Newport, Rhode Island. Posterior aspect. 1/7 nat. size....

23 minute read

Read Chapter

Plate 22 MANDIBLES OF ZIPHIUS CAVIROSTRIS

Mandibles of Ziphius cavirostris . Fig. 1. Charleston, South Carolina. (Type of Z. semijunctus (Cope).) 2. Newport, Rhode Island. 3. Bering Island. Cat. No. 22069, U.S.N.M. 4. Bering Island. Cat. No. 21248, U.S.N.M. All figures about ⅕ nat. size....

17 minute read

Read Chapter

Plate 23 MANDIBLES OF ZIPHIUS CAVIROSTRIS

Fig. 1. Bering Island. (Type of Ziphius grebnitzkii Stejneger.) Cat. No. 20993, U.S.N.M. About ⅕ nat. size. 2. Newport, Rhode Island. Symphysis. Dorsal aspect. 3. The same. Ventral aspect....

13 minute read

Read Chapter

Plate 24 MANDIBLES AND VERTEBRÆ OF ZIPHIUS CAVIROSTRIS

Mandibles and vertebræ of Ziphius cavirostris . Fig. 1. (Type of Z. semijunctus (Cope).) Charleston, South Carolina. Cat. No. 21975, U.S.N.M. ⅕ nat. size. 2. (Type of Z. grebnitzkii Stejneger.) Bering Island. Cat. No. 20993, U.S.N.M. About ⅕ nat. size. 3. Barnegat, New Jersey. About ⅕ nat. size. 4. Vertebræ. (Type of Z. semijunctus (Cope).) From right to left, as follows: 1-3 cervicals, 1st thoracic, 7th thoracic, 8th thoracic, 1st lumbar, 1st caudal. About ¼ nat. size....

30 minute read

Read Chapter

Plate 25 SKELETON OF ZIPHIUS CAVIROSTRIS

Ziphius cavirostris (Type of Z. semijunctus (Cope).) Fig. 1. Atlas. Anterior surface. Defective on left side. 2. Sternum. Ventral aspect. 3. Right pectoral limb. Scapula somewhat defective. About ࡩ nat. size....

15 minute read

Read Chapter

Plate 26 SKULLS OF BERARDIUS BAIRDII

Berardius bairdii. Fig. 1. Type-skull. Bering Island. Immature. Cat. No. 20992, U.S.N.M. Dorsal aspect. About 1/10 nat. size. Frontals and zygomatic processes somewhat defective. 2. Skull. St. George Island, Pribilof Group, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Dorsal aspect. About 1/10 nat. size. 3. Skull. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Dorsal aspect. All figs. about 1/10 nat. size....

23 minute read

Read Chapter

Plate 27 SKULLS OF BERARDIUS BAIRDII

Fig. 1. Type-skull. Bering Island. Immature. Cat. No. 20992, U.S.N.M. Ventral aspect. 2. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Ventral aspect. 3. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Ventral aspect....

15 minute read

Read Chapter

Plate 28 SKULLS OF BERARDIUS BAIRDII

Fig. 1. Skull. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Lateral aspect. 2. Skull. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Lateral aspect. 3. The same skull. Posterior aspect. 4. Type-skull. Bering Island. Cat. No. 20992, U.S.N.M. Posterior aspect....

18 minute read

Read Chapter

Plate 29 SKULLS OF BERARDIUS BAIRDII

Figs. 1-4. Bering Island. Young. Cat. No. 142118, U.S.N.M. 5. Skull. St. George Island, Alaska. Male, immature. Cat. No. 29727, U.S.N.M. Posterior aspect. 1/10 nat. size....

12 minute read

Read Chapter

Plate 30 MANDIBLES OF BERARDIUS BAIRDII

Mandibles of Berardius bairdii . Fig. 1. Bering Island. Young. Cat. No. 142118, U.S.N.M. 2. St. George Island, Alaska. Male, immature. Cat. No. 49727, U.S.N.M. 3. Bering Island. Adult. (From mounted skull.) Dorsal aspect, 1/10 nat. size....

16 minute read

Read Chapter

Plate 31 MANDIBLES OF BERARDIUS BAIRDII

3. Bering Island. (From type-skull.) Immature. Cat. No. 20992, U.S.N.M. 4. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. 5. Bering Island. Adult. (From mounted skull.) Lateral aspect. 1/10 nat. size....

14 minute read

Read Chapter

Plate 32 BERARDIUS BAIRDII AND HYPEROÖDON AMPULLATUS

Berardius bairdii. Fig. 1. Vertebræ. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. The vertebræ from left to right are as follows: 1-3 cervicals, 1st thoracic, 8th thoracic, 9th thoracic, 10th thoracic, 1st lumbar, 1st caudal. 2. The same specimen. Sternum. Ventral aspect. About 1/7 nat. size. 3. Hyperoödon ampullatus. Newport, Rhode Island. Acad. Nat. Sci. Philadelphia....

23 minute read

Read Chapter

Plate 33 SKELETON OF BERARDIUS BAIRDII

Fig. 1. Berardius bairdii. Atlas. St. George Island, Alaska. Female, adult. Cat. No. 49726, U.S.N.M. Anterior surface. 1/7 nat. size. 2. The same specimen. Right scapula. 1/7 nat. size. 3. The same specimen. Humerus. 1/7 nat. size. 4. Berardius bairdii. St. George Island, Alaska. Left pectoral limb. Cat. No. 49727. Male, immature. ⅕ nat. size....

21 minute read

Read Chapter

Plate 34 TYMPANIC BONES OF MESOPLODON, ZIPHIUS, AND BERARDIUS

Tympanic bones of Mesoplodon , Ziphius , and Berardius . Fig. 1. Mesoplodon densirostris (?). Annisquam, Massachusetts. 2. Mesoplodon stejnegeri. Yaquina Bay, Oregon. 3. Ziphius cavirostris. (Type of Z. semijunctus (Cope).) Charleston, South Carolina. 4. Ziphius cavirostris. (Type of Z. grebnitzkii Stejneger.) Bering Island. 5. Ziphius cavirostris. Barnegat City, New Jersey. 6. Ziphius cavirostris. Newport, Rhode Island. 7. Berardius bairdii. Centerville, California. Ventral aspect. Nat. size...

32 minute read

Read Chapter

Plate 35 TYMPANIC BONES OF MESOPLODON, ZIPHIUS, AND BERARDIUS

Tympanic bones of Mesoplodon , Ziphius , and Berardius . Fig. 1. Mesoplodon densirostris (?). Annisquam, Massachusetts. 2. Mesoplodon stejnegeri. Yaquina Bay, Oregon. 3. Ziphius cavirostris. (Type of Z. semijunctus (Cope).) Charleston, South Carolina. 4. Ziphius cavirostris. (Type of Z. grebnitzkii Stejneger). Bering Island. 5. Ziphius cavirostris. Barnegat City, New Jersey. 6. Ziphius cavirostris. Newport, Rhode Island. 7. Berardius bairdii. Centerville, California. External surface. Nat. size.

32 minute read

Read Chapter

Plate 36 PERIOTIC BONES OF MESOPLODON, ZIPHIUS, AND BERARDIUS

Right periotic bones of Mesoplodon , Ziphius , and Berardius . Fig. 1. Mesoplodon densirostris. (?) Annisquam, Massachusetts. 2. Mesoplodon stejnegeri. Yaquina Bay, Oregon. 3. Ziphius cavirostris. (Type of Z. semijunctus (Cope).) Charleston, South Carolina. 4. Ziphius cavirostris. (Type of Z. grebnitzkii Stejneger.) Bering Island. 5. Ziphius cavirostris. Barnegat City, New Jersey. 6. Ziphius cavirostris. Newport, Rhode Island. 7. Berardius bairdii. Centerville, California. Inner aspect. Nat. siz

33 minute read

Read Chapter

Plate 37 PERIOTIC BONES OF MESOPLODON, ZIPHIUS, AND BERARDIUS

Right periotic bones of Mesoplodon , Ziphius , and Berardius . Fig. 1. Mesoplodon densirostris. (?) Annisquam, Massachusetts. 2. Mesoplodon stejnegeri. Yaquina Bay, Oregon. 3. Ziphius cavirostris. (Type of Z. semijunctus (Cope).) Charleston, South Carolina. 4. Ziphius cavirostris. (Type of Z. grebnitzkii Stejneger). Bering Island. 5. Ziphius cavirostris. Barnegat City, New Jersey. 6. Ziphius cavirostris. Newport, Rhode Island. 7. Berardius bairdii. Centerville, California. Outer aspect. Nat. siz

33 minute read

Read Chapter

Plate 38 TEETH OF ZIPHIUS CAVIROSTRIS

Teeth of Ziphius cavirostris . Fig. 1. Type of Z. semijunctus (Cope). Charleston, South Carolina. Cat. No. 21112, U.S.N.M. Left tooth. Inner surface. 2. The same. Right tooth. Outer surface. 3-4. Barnegat City, New Jersey. The two large teeth. 5. The same. One of the rudimentary teeth. 6. Topotype of Z. grebnitzkii . Cat. No. 22069, U.S.N.M. Bering Island. Left tooth. Outer surface. 7. The same. Right tooth. Inner surface. 8. Type of Z. grebnitzkii Stejneger. Cat. No. 20993, U.S.N.M. Bering Isla

39 minute read

Read Chapter

Plate 39 TEETH OF BERARDIUS BAIRDII

Teeth of Berardius bairdii . Fig. 1. Bering Island. Young. Cat. No. 142118, U.S.N.M. Left anterior tooth. Inner surface. 2. The same. Left posterior tooth. Inner surface. 3. St. George Island, Alaska. Male, immature. Cat. No. 49727, U.S.N.M. Right anterior tooth. Inner surface. 4. The same. Left anterior tooth. Outer surface. 5. Centerville, California. Male, adult. Cat. No. 49725, U.S.N.M. Left anterior tooth. Inner surface. 6. The same. Right posterior tooth. Outer surface. 7. St. George Islan

37 minute read

Read Chapter

Plate 40 MESOPLODON EUROPÆUS AND M. STEJNEGERI

Fig. 1. Stomach of Mesoplodon europæus . Atlantic City, New Jersey. Cat. No. 23346, U.S.N.M. Ventral aspect. About ¼ nat. size. 2. The same. Dorsal aspect. About ¼ nat. size. 3. The same. Perineum. a , penis. b , rudimentary mammary slits. c , anus. About ¼ nat. size. 4. Mesoplodon stejnegeri. Yaquina Bay, Oregon. Cat. No. 143132, U.S.N.M. Head, showing teeth in natural position....

26 minute read

Read Chapter

Plate 41 MESOPLODON AND ZIPHIUS

Fig. 1. Mesoplodon europæus. Atlantic City, New Jersey. Male, young. Cat. No. 23346, U.S.N.M. Length 12½ feet. 2. The same. Dorsal aspect. 3. Ziphius cavirostris (?). Kiska Harbor, Alaska, 1904. 4. Ziphius cavirostris. Newport, Rhode Island. Male, adult. Length 20 feet 1 inch. Cat. No. 49599, U.S.N.M....

20 minute read

Read Chapter

Plate 42 BERARDIUS BAIRDII

Fig. 1. Berardius bairdii. St. George Island, Alaska. Female, adult. Length 40 feet 2 inches. Cat. No. 49726, U.S.N.M. Ventral aspect. 2, 3. Berardius bairdii. Centerville, California. Male (?), adult. Cat. No. 49725, U.S.N.M. Length about 41 feet. Head from in front and from below. 4. The same. Skeleton. About ⅙ nat. size. The pectoral fin is modeled from another specimen. It is on the wrong side in this figure....

25 minute read

Read Chapter