FULIGO.] PHYSARACE.E. 67 



2. F. ochracea Peck, in Rep. N. York Mus. Nat. Hist., xxxi., 

 Bot., p. 56 (1879). Plasmoclium vitelline-yellow (teste Dr. Rex). 

 ./Ethalia 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 scattered 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 /xdiam. Mass., 

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

 Hist., xxviii. (1875). 



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

 (United States). 



Very closely allied to Fultf/o x/yj//<v, from which it differs in the short 

 hyaline threads of the capillitium and the larger rougher spores. 



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



3. F. ellipsospora Lister. Plasmodium ? ^Ethalia 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 rethalium more or less perfect, mem- 

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

 Capillitium of large white lime-knots connected by simple or 

 branching hyaline threads. Spores brownish-violet, spinulose, 

 ellipsoid, 13 to 17 x 10 to 12 //,. Physarum ellipsosporum Rost., 

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

 Hist. Iowa, ii., p. 158. Eiif^ruHnni cin.ereum Schwein., in Trans. 

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

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



Plate XXIV.. B. a. rcthalia, x 5; b. rethalium, x 20; c. capillitium 

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



The type specimen of B<nll,<nit><( coaduaf" Rost. 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 AZthaliopsis stercori- 

 f or mis Zopf (Pilzthiere, p. 150, 1884, syn. Fuligo stercpriforniix 3 [ass., 

 Mon., p. 342) so well describes F. cllipsospom that 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 Racib. 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. simnlans Karst., in Bidr. Kann. Finl. Nat., xxxi., 108 

 (1879), on leaves of V actinium Vitis-idoea L. in Finland, is 



