CRIBRARIA.] HETERODERMACE.E. 141 



yellowish-red, minutely warted, 5 to 7 /z diam. Pers., Syn 

 Fung., p. 193. Stemonitis rufa Roth, Fl. Germ., i., p. 548 (1788) 

 Cribraria rufa Host., Mon., p. 232 (1875); Cooke, Myx. Brit, 

 p. 58 ; Blytt, Bidr. K. Norg., Sop. iii., p. 9 ; Mass., Mon., p. 63 

 Cribraria intermedia Schrad., Nov. Gen. PL, p. 4 (1797). C.fulva 

 Schrad., I.e., p. 5. 



Plate LIIL, A. a. sporangia, x 20 ; b. net and cup of sporangium-wall, 

 x 50 ; c. spore and plasmodic granules, x 600 (Scotland). 



Hal. On dead wood. Moffat, Scotland (L:B.M.106) ; Baden Baden, 

 Germany (L:B.M.106). 



4. C. minutissima Schwein., in Trans. Am. Phil. Soc., New 

 Series, iv., p. 260 (1834). Plasmodium ? Total height O5 to 

 0*7 mm. Sporangia globose, gregarious, stipitate, erect or inclined, 

 O'l to O2 mm. diam., nut-brown ; cup half the height of the 

 sporangium, or more, or less, or wanting, pale nut brown, nearly 

 even at the margin, faintly striate longitudinally with lines of 

 plasmodic granules 1 /x diam ; nodes of the net hardly expanded, 

 or narrow and flattened, connected by three to five delicate 

 threads. Stalk filiform, one and a half to four times the height 

 of the sporangium, brown. Spores ochraceous, almost smooth, 



5 to 6 - 5 //,. Host., Mon., App., p. 31. Cribraria minima Berk. 



6 Curt., in Grev., ii., p. 67 ; Mass., Mon., p. 59. C. microscopica 

 Berk. & Curt,, in Grev., ii., p. 67; Host., Mon., App., p. 31; 

 Mass., Mon, p. 62. 



Plate LIII., A. d. to g. sporangia after dispersion of spores; k. spore 

 and plasmodic granules, x 600 (United States). 



In the large gatherings obtained by Dr. Rex of this species, great 

 variety is found in the size of the cup and in the extent to which 

 nodes of the net are enlarged. Nothing now remains in this country 

 of the type specimen of C. microscopica Berk. & Curt. ; but from 

 Berkeley's description and figure it differs from C. minutissima only 

 in having the nodes of the net rather more expanded, a character 

 so variable that the organism is here included under C. minutissima. 



Hob. On dead wood. Philadelphia (L:B.M.107) ; S. Carolina 

 (B. M. 671). 



5. C. macrocarpa Schrad., Nov. Gen. PI., p. 8 (1797). 

 Plasmodium ? Total height 2 mm. Sporangia globose or 

 turbinate, gregarious or scattered, stipitate, erect, 0'6 to 0'8 mm. 

 diam., rufous-brown ; cup about one-third of the sporangium, 

 orange-brown, with numerous dark longitudinal ribs, perforated 

 above, margin irregularly and deeply toothed, merging into the 

 branching nodes of the net ; nodes flattened, elongated, confluent 

 and irregular in the low T er part, branching and polygonal, with 

 the angles continued into the connecting threads above ; the 

 nodes and ribs of the cup beset with dark plasmodic granules 

 1 to 2 /x, diam. Stalk cylindrical, O8 to 1 mm. high, O'l mm. 

 thick, furrowed, dark brown. Spores ochraceous, nearly smooth, 

 4 to 6 fji diam.-- Rost,, Mon,, p. 238 ; Cooke, Myx. Brit., p. 59; 

 Blytt, Bidr. K. Norg., Sop. iii., p. 10 ; Mass., Mon., p. 56. 



