FtJLIGO.] PHYSARACE^. 67 



2. F. ochracea Peck, in Eep. IST. York Mus. Nat. Hist., xxxi., 

 Bot., p. 5'6 (1879). Plasmodium vitelline-yellow (teste Dr. Eex). 

 ^thalia pulvinate, 2 mm. to 1 cm. broad, formed of very closely 

 interwoven sporangia, the cortex delicate and membranous or 

 hardly developed, yellowish grey or grey, with scattej-ed deposits 

 of yellow lime-granules. Capillitium of numerous fusiform or 

 branching yellow lime-knots connected by rather short hyaline 

 threads. Spores violet-brown, spinulose, 10 to 11 ^diam. — Mass., 

 Mon., p. 342. Licea ochracea Peck, in Rep. N. York Mus. Nat. 

 Hist., xxviii. (1875). 



Plate XXIV., A. — e. capillitium and spores, x 280; /. spore, x 600 

 (United States). 



Very closely allied to Fuligo septica, from which it differs in the short 

 hyaline threads of the capillitium and the larger rougher spores. 



Hab. On rotten wood. — Pennsylvania (L:B.M.41). 



3. F. ellipsospora Lister. Plasmodium? ^Slthalia pulvinate, 

 elongate, 4 to 6 mm. long, or irregular and effused, formed of closely 

 interwoven sporangia enclosed in a smooth white cortex densely 

 charged with lime, continuous with the white hypothallus. 

 Sporangium-walls within the sethalium more or less perfect, mem- 

 branous, with deposits of white lime-granules. Columella none. 

 Capillitium of large white lime-knoffe connected by simple or 

 branching hyaline threads. Spores brownish-violet, spinulose, 

 ellipsoid, 13 to 17 x 10 to 12 /a. — Physarum elUpsosporum Rost,, 

 Mon., App., p. 10; Mass., Mon., p. 310; Macbride, in Bull. Nat. 

 Hist. Iowa, ii., p. 158. Enteridium cinerewm Sohwein., in Trans. 

 Am. Phil. Soc, new ser., iv., p. 261. Badhamia coadnata Rost., 

 Men., p. 146 ; Mass., Mon., p. 325. 



Plate XXIV. , B. — a. sthalia, x 5 ; b. sethalium, x 20 ; o. capillitium 

 and spores, x 280 ; d. spore, x 600 (TTuited States). 



The type specimen of Badhamia coadnata Eost. from Cuba in the 

 Strassburg collection is similar to the American specimens of F. ellip- 

 sospora ; the large branching lime-knots are connected by very short 

 hyaline threads. The account given by Zopf of ^thaliopsis stercori- 

 formis Zopf (Pilzthiere, p. 150, 1884, syn. Fuligo stercoriformis Mass., 

 Mon., p. 342) so well describes F. ellipsospora th&t they appear to be 

 the same species. 



Hab. On dead leaves, etc.— Iowa (B. M. 810) ; Ohio (L:B.M. 42) ; 

 S. Carolina (B. M. 845) ; Cuba (Strassb. Herb.). 



SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 



4. F. tatrica Raoib. in Hedw. 1885, p. 169, on decaying 

 trunks in Hungary, is described as differing from F. septica in 

 having minutely spinulose spores. This does not constitute a 

 specific distinction, as the spores of F. septica vary slightly in 

 roughness, and are seldom quite smooth when magnified 1200 

 diam. 



5. F. simulans Karst., in Bidr. Kann. Mnl. Nat., xxxi., 108 

 (1879), on leaves of Vaccinium Vitis-idcea L. in Finland, is 



