CIENKOWSKIA 79 



1892. Craterium confusum Massee, Mon., p. 263, (in part). 



1893. Craterium pedunculatum Trent., Macbride, Bull. Lab. Nat. Hist. 

 Icnua, II., p. 385. 



1894. Craterium pedunculatum Trent., Lister, Mycetozoa, p. 70. 



Sporangia scattered, gregarious, cyathiform or turbinate, gray- 

 ish brown, stipitate, the peridial wall rather thick, double, open- 

 ing by a distinct lid which lies usually below the slightly 

 thickened and everted margin of the cup ; stipe paler, trans- 

 lucent, about equalling in height the peridial cup, longitudinally 

 wrinkled, with hypothallus scant or none ; capillitium physaroid, 

 the calcareous nodules large, white, and generally aggregated 

 at the centre of the cup ; spore-mass black, spores by trans- 

 mitted light violaceous, minutely warted, 8-10 /A. 



This is the most highly differentiated of the whole series. 

 The cup is shapely and well denned, while the lid is not only 

 distinct, but is a thin, delicate membrane of slightly different 

 structure when compared with the peridial wall. It is in all 

 the specimens before me much depressed below the mouth of 

 the sporangium, and the whole structure in our specimens 

 corresponds with Fries's description of C. pedunculatum Trent., 

 while specimens received from Europe correspond to Fries's 

 account of C. minutum Leers. Nevertheless we are assured 

 that the two forms are in Europe developed from the same 

 plasmodium, and therefore adopt the earlier specific name as 

 above. N. A. F., 2500. This is probably Fungoides convivalis 

 of Batsch and Micheli. 



Common throughout the eastern United States, west to Iowa 

 and south to Louisiana. 



7. Cienkowskia Rostafinski. 



1873. Cienkowskia Rostafinski, Versuch, p. 9. 



Fructification plasmodiocarpous, irregularly dehiscent, the 

 wall a thin cartilaginous membrane destitute of lime, except the 

 capillitial attachments within ; capillitium scanty but rigid, and 

 characterized everywhere by peculiar hook-like branchlets, free 

 and sharp-pointed. The spores as in Physarum, etc. 



