The Mxyomycetes of Eastern Iowa. 387 



of our handsomest forms; differs from D. s^Iendens Pk., chiefly 

 in the relative proportions of the stipe and columella. The 

 whole sporangium is in the present species cylindric, in the 

 former, globose. For these reasons we have not thought nec- 

 essary to figure D. leucofoda. For character of the genus in 

 general the reader is referred to Plate VII, of the preceding 

 number. 



6. TiLMADOCHE NUTANS Rostofiuskl. 



Sporangia gregarious, depressed, spherical, stipitate, grey 

 or white, thin-walled, nodding; stipe long, tapering upwards, 

 brown or ashen, striate, graceful; capillitium abundant, threads 

 delicate, intricately combined in loose net-work with occasional 

 minute, rounded, calcareous nodules; spores minutely rough- 

 ened, globose, about lO/^. 



Differs from T. viridis Gmel.= Z'. miitahilis R., chiefly in 

 color. Cf. description of T. viridis on p. 152. Rare. The 

 only specimens found on a dry bark-less log in the woods near 

 Iowa City. 



7. Cribraria dictydioides Cooke and Balfour. 



Sporangia globose, stipitate, gregarious, dull ochraceous, 

 calyculus wanting; peridial ribs broad below tapering up- 

 wards, everywhere laterally connected by delicate transverse 

 threads and blending in the net above; net convex with nu- 

 merous granular nodes, connected in all directions by most 

 exquisite colorless filaments; stipe concolorous; spores small 

 minutely roughened, about 7 ,"• 



Differs from C. intricata Schrader, p. 119, by the absence 

 of a calyculus, and by the fact that the nodes of the net are 

 joined by simple lines, i. e., by simple threads or filaments. 

 The species are sometimes hard to separate. 



8. Hemiarcyria intorta Lister. 



Sporangia simple, gregarious, short, stipitate, erect, golden 

 yellow, globose-turbinate or pyriform rupturing irregularly at 



