74 
ENDOSPOREiE. 
[CRATERIUM. 
Scotland (K. 299) ; France (Paris Herb.) ; Germany (Strassb. Herb.) : 
Ohio (L:B.M.49) ; S. Carolina (B. M. 888). 
6. C. citrinellum Lister. Plasmodium 1 Sporangia subglobose, 
0-6 to 0-8 mm. diam., stipitate, erect, gregarious, rugose, lemon- 
yellow or ochraceous, tinged with orange at the base ; sporangium- 
wall of two layers, the outer cartilaginous, yellow, rugose from 
dense innate areolated deposits of lime, easily separating from the 
colourless membranous inner layer. Columella none. Stalk 
cylindrical, 0-3 to 0-4 mm. high, stout, plicate, orange-red, 
translucent. Capillitium a network of colourless hyaline thi-eads, 
with many large, irregular, and branching white 4ime-knots. 
Spores purple-brown, rather strongly spinulose, 10 to 12 /x diam. 
— Diderma citrinum Peck, in Rep. N. York Mus. Nat. Hist., xxii,, 
p. 89 (1869). Physarum citrinellum'Peck., I.e., xxxi., p. 55 (1879); 
Mass., Mon., p. 278. 
Plate XXVIII., B. — a. sporangia, x 20 ; capillitium and spores, x 
280 ; c. spore, x 600 (United States). 
Closely allied to Craterium mutahile Fries, from which it differs in the 
stouter structure of the sporangium-wall and in the larger, rougher 
spores. The type specimen of Physarum lejjidodermoides Blytt, Bidr. 
Norg., Sop. iii., p. 4 (1892), from RoUag, Telemarken, on moss, has sub- 
globose stipitate sporangia, 0-7 to 0'8 mm. diam. ; the sporangium- wall 
breaks up into shining convex pale brown scales, densely charged with 
deposits of lime ; there is no columella ; the stalks are 0'5 mm. high, 
stout, broader at the base, pale yellow-brown, without lime-deposits ; the 
capillitium consists of large irregular pale brown lime-knots connected 
by branching hyaline threads ; the spores are purple-brown, spinulose, 
9 to 11 /X diam. This appears to be represented by a single gathering, 
and to have close affinity with C. citrinellum. 
Hob. On moss. — New York (L:B.M.50). Allied species ; Physarum 
lepidodermoides, Norway (L:B.M.50). 
SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 
7. C. porphyrium Schwein., in Trans. Am. Philos. Soc, Phil, 
iv., p. 258 ; sporangia densely clustered, turbinate, purple-red, 
glossy ; stalks very short, connate into a thick basal mass ; spores 
and the elastically expanding capillitium red. 
This description applies to Hemitrichia nMformis List, 
SPECIES EXCLUDED FROM THE GENUS, 
C. ruhiginosum Mass. = 
G. dictyospermum Mass.= 
C. Gurlisii Mass. = 
6', lilacinum Mass. = 
Badhamia ruhiginosa Post. 
Badhamia ruhiginosa Post, 
Badhamia ruhiginosa Post. 
Badhamia lilaciifia Post, 
