The Myxomycctcs of the Miami I'al/ey, Ohio. 141 



short, tapering upward, bent at the apex, dark purple in color. 

 Spores in the mass bright purple, globose, even, 5-7 niic. in 

 diameter. 



Growing on old wood. Sporangium .4-. 5 mm. in diameter, 

 the stipe two or three times as long. It does not appear to be 

 greatly different from Cribraria purpurea, Schrad. 



b. Spora)iq;iuni, small . 



5. Crihrari.v texella. Schrad. Sporangium small, glob- 

 ose, stipitate, cernuous; the calyculus browm, shining, granu- 

 lose within and faintly ribbed, occupying from one-fourth to 

 one-half the sporangium, sometimes the outer thin membrane 

 early disappearing; the network of slender threads with small 

 roundish or irregular nodules at the angles, each with several 

 (4-8) radiating threads, sometimes two or three with free 

 extremities, the meshes triangular or rhombic. vStipe long, 

 tapering upward, flexuous, curved at the apex, purplish-brown 

 in color. Spores pale ochraceous in mass, globose, even, 5-7 

 mic. in diameter. 



Growing on old wood. The sporangium .3-.4 " mm. in 

 diameter, the stipe three to five times as long. This is a much 

 more delicate species than Cribraria dictydioides. The caly- 

 culus is variable in size ; in some examples the thin connect- 

 ing membrane between the ribs has disappeared. 



6. Cribraria microcarpa, vSchrad. Sporangium very 

 small, globose, stipitate, somewhat cernuous ; the calyculus 

 represented by a few short brown ribs, the outer membrane 

 soon disappearing ; the netw^ork of slender threads, with small 

 roundish nodules at the angles, each with several (4-6) radia- 

 ting threads, with an occasional free extremity, the meshes 

 largely rhombic. Stipe very long, slender, somewhat flexuous, 

 bent at the apex, purplish-brown in color. Spores in mass 

 pale ochraceous, globose, even, 6-7 mic. in diameter. 



Growing on old wood. Sporangium .22-. 27 mm. in diameter, 

 the stipes 1-2 mm. in length. Readily distinguished by its 

 very small sporangium and the comparatively very long stem. 

 I am indebted to Dr. George A. Rex for specimens of this 

 species. 



