CRIBRARIA 211 



7. Cribraria atrofusca Martin & Lovejoy 



Jour. Wash. Acad. Sc. 22 : 92. 1932. 

 PL XV, Figs. 368, 369, 370. 



Sporangia loosely gregarious, dark purplish brown to nearly black, 

 shining, iridescent, globose or somewhat obovate or occasionally pyri- 

 form, usually erect, 0.4-0.6 mm. in diameter, total height 1-2 mm. 

 or more; calyculus occupying nearly or quite one-half of spore-case, 

 marked by slender granular ribs radiating from the stipe and by broken 

 concentric granular thickenings deposited on the inside, the concen- 

 tric character being visible without under the lens in brilliant light, 

 the margin with very fine teeth and long, slender tooth-like projec- 

 tions which bear the net and are similar to its nodes; net regular, 

 with broad connecting threads, the nodes expanded, granular, dark 

 brown, with a few free ends arising from both nodes and threads, the 

 silvery peridium tending to persist; hypothallus small; stipe dark 

 brown or nearly black, slender, furrowed, 0.6-1.8 mm. long; spores 

 dark reddish brown in mass, grayish brown by transmitted light, 

 finally verrucose, 7.5-8.1 /z, averaging 7.9 fx. 



A distinct species. The dark glistening sporangium, the dark spores, 

 and the granular concentric rings within the calyculus are diagnostic. 

 The tooth-like projections which bear the net are longer and more 

 slender than in any other species, but their structure suggests that 

 they are to be regarded as elements of the net rather than of the 

 calyculus. The peridium tends to be more persistent than in most 

 cribrarias and in its shining silvery character suggests Lamproderma 

 arcyrionema. The spores are much the color of those of the more 

 ferruginous species of Stemonitis. 



Colorado. 



8. Cribraria cuprea Morgan 



Jour. Cin. Soc. Nat. Hist. 15 : 142. 1893. 

 PL XIV, Figs. 346, 347. 



1925. Cribraria languescens Rex ex Lister, Mycetozoa ed. 3. 176, in part. 



Sporangia gregarious, small, 0.3-0.4 mm., subglobose, copper col- 

 ored, stipitate, nodding; stipe concolorous or darker below, subulate, 

 curved at the apex, 2-4 times the diameter of sporangium; calyculus 

 one-third to one-half the sporangium, finely ribbed and granular 

 within, the margin nearly even; net rather rudimentary, the meshes 

 large, triangular or quadrilateral, the nodes also large, flat, concolorous, 

 thickened, the threads slender, transparent, with few free ends; spores 

 in mass copper colored, by transmitted light colorless, minutely 

 roughened, 6-7 fx. 



