THE MACMILLAN COMPANY NEW YORK · BOSTON · CHICAGO · DALLAS ATLANTA · SAN FRANCISCO MACMILLAN & CO., Limited LONDON · BOMBAY · CALCUTTA MELBOURNE THE MACMILLAN CO. OF CANADA, Ltd. TORONTO A DESCRIPTIVE LIST OF ALL SPECIES OF MYXOMYCETES HITHERTO REPORTED FROM THE CONTINENT OF NORTH AMERICA WITH NOTES ON SOME EXTRA-LIMITAL SPECIES BY THOMAS H. MACBRIDE STATE UNIVERSITY OF IOWA NEW AND REVISED EDITION New York THE MACMILLAN COMPANY LONDON: MACMILLAN AND CO., Ltd. 1922 All rights reserved Co

The indulgent student will please notice the following for the new edition North American Slime Moulds — On p. 63 , No. 17, read Physarum megalosporum Macbr. Last line should read 1917 Physarum melanospermum Sturgis, Mycologia , Vol. IX, p. 323. On p. 67 , last line but one, at the end, read, p. 323. On p. 67 , insert just before No. 23, Vicinity of Philadelphia,— Bilgram . On p. 327 , Plate XIII , lacks numbers. These may readily be supplied by consulting descriptive text. On p. 344 , in explan

The present work has grown out of a monograph entitled Myxomycetes of Eastern Iowa , published by the present author about eight years ago. The original work was intended chiefly for the use of the author's own pupils; but interest in the subject proved much wider than had been supposed, and a rather large edition of that little work was speedily exhausted. At that time literature on the subject in question—literature accessible to English readers—was scant indeed. Cooke's translation of Rostafi

The first edition of this little book having been exhausted long ago, the writer in this second issue takes opportunity to correct sundry errata, typographical and other, and at the same time to incorporate such new information in reference to individual species and to the subject entire as the researches of more recent years may afford. To Miss Gulielma Lister, of London, the writer expresses his sense of deep obligation for much assistance in settling difficult matters of nomenclature and iden

The following are the principal works consulted in the prosecution of the investigations here recorded:— 1763. Adanson, M. Familles des Plantes. 1805. Albertini—see under Schweinitz. 1841. Annals and Magazine of Natural History. London, various volumes: 1841, Ser. I., vol. vi.; 1850, Ser. II., vol. v. 1887. Annals of Botany, vols. i-xxxi. 1783. Batsch, A. J. G. C. Elenchus Fungorum; with Continuatio I. 1786; Continuatio II. 1789. 1775. Battara, A. Fungorum Agri Arimensis Historia. 1860. Berkeley

The Myxomycetes, or slime-moulds, include certain very delicate and extremely beautiful fungus-like organisms common in all the moist and wooded regions of the earth. Deriving sustenance, as they for the most part do, in connection with the decomposition of organic matter, they are usually to be found upon or near decaying logs, sticks, leaves, and other masses of vegetable detritus, wherever the quantity of such material is sufficient to insure continuous moisture. In fruit, however, as will ap

THE MYXOMYCETES ( Link ) DeBary Chlorophyl-less organisms whose vegetative phase consists of a naked mass of multinuclear protoplasm, the plasmodium ; reproduced by spores which are either free or more commonly enclosed in sporangia, and which on germinating produce ciliated or amœboid zoöspores, whose coalescence gives rise to the plasmodium. The Myxomycetes are,— Sub-Class PHYTOMYXINÆ Schroeter The parasitic Myxomycetes affecting plants include but few (four or five) species, distributed among

a. This volume is as we see, a descriptive list of the various forms of the Myxomycetes in so far as these have come to the personal notice of the writer. Each form is designated, as is usual in discussing objects of the sort, by a particular binomial name, followed, in abbreviated form, by the name of the student or author who in describing the form in question used the combination. Thus Stemonitis splendens was first described by Rostafinski, and the name he thus used is applicable to the form

Note. —Plates I., II., IV., VI., VII., VIII., IX., X., were originally by Miss Mary P. Macbride ; Plates V., XI., XII., were by Mrs. Hattie J. Douglass ; Plates XIII., XIV., XV., XVI., XVII., were by the late Mrs. Bertha E. Linder Pumphrey ; Plate III. was the joint work of Mrs. Pumphrey and Miss Macbride . All these, except IV., have been re-drawn for new plates; XVI., with additions, by Miss Margaret Hayes ; the remainder by Mr. W. J. Calvin , C. E. Plate XVIII. is by Miss Hayes ; Plate XIX. b