178 ENDOSPOREAE [CRIBRARIA 



Wales (B.M. 2720) ; Moffat, Scotland (B.M. 1427) ; Sweden (B.M. 

 2722); Germany (B.M. 2231); Switzerland (B.M. 2721); Bohemia 

 (B.M. 2723); Washington State (B.M. 2725). 



4. C. minutissima Schwein. in Trans. Amer. Phil. Soc.,n.s. 

 iv. 260 (1832). Plasmodium ? Total height 0-5 to 0-7 mm. 

 Sporangia stalked, gregarious, globose, erect or inclined, 

 0*1 to 0*2 mm. diam., nut-brown ; cup either about half the 

 height of the sporangium, or entirely wanting, pale nut- 

 brown, nearly even at the margin, faintly striate longitudinally 

 with lines of plasmodic granules 1 /x diam. ; nodes of the net 

 not 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, 

 minutely spinulose, 5 to 6-5 /x. — Rost. Mon., App. p. 31 ; 

 Macbr. N. Am. Slime-Moulds, 162. Cribraria minima Berk. 

 & Curt, in Grev., ii. 67 (1873) ; Mass. Mon., 59. C. micro- 

 scopica Berk. & Curt. I.e. ; Rost. I.e. ; Mass. Mon., 62. 



PI. 140. — d. to g. sporangia after dispersion of spores ; h. spore and plasmodic 

 granules ; (United States). 



In the large gatherings obtained by Dr. Rex of this minute 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 the present species only 

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

 so variable that G. microscopica is here included under C. minutissima. 

 The type of C. minima Berk., from South Carolina (B.M. 671) is the 

 form of the present species having a deep cup ; the nodes of the net 

 are either triangular or unexpanded. 



Hob. On dead wood.— Ceylon (B.M. 2726) ; South Carolina (B.M. 

 671) ; Philadelphia (B.M. 2728) ; Colorado (B.M. 2727). 



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

 Plasmodium slate-coloured. Total height 2 mm. Sporangia 

 stalked, gregarious or scattered, globose or turbinate, erect, 

 0-6 to 1 mm. diam., rufous-brown ; cup about one-third of the 

 sporangium, orange-brown, with numerous dark longitudinal 

 ribs, perforated above, irregularly and deeply toothed at the 

 margin and merging into the branching nodes of the net ; nodes 

 flattened, elongated, confluent and irregular in the lower part, 

 branching and polygonal with the angles continued into the 

 connecting threads above; the nodes and ribs of the cup 

 studded with dark plasmodic granules 1 to 2 /x diam. Stalk - 8 

 to *1 mm. high, 0*1 mm. thick, furrowed, dark brown. Spores 

 ochraceous, nearly smooth, 4 to 6 /x diam. — Rost. Mon., p. 238 ; 

 Mass. Mon., 56 ; Macbr. N. Am. Slime-moulds, 162. C. 

 tatrica Racib. in Hedw., xxiv. 170 (1885) Heterodictyon 

 Bieniaszii Racib. in Hedw., xxviii. 121 (1889). 



