64 THE NORTH AMERICAN SLIME-MOULDS 



regarded as defining anything, this is the same as P. chryso- 

 trie/mm B. and C. It resembles somewhat P. serpula Morg., 

 but differs externally in color and in the surface scales, which 

 are not perceptible in the Physarum. The present species 

 also resembles Cienkowskia reticulata (Schw.) Rost, but has 

 a different capillitium. See under that species. 



Chiefly eastern. New England, Pennsylvania, Ohio, South 

 Carolina. 



2. BADHAMIA PANICEA (Fries} Rost. 



1829. Physarum paniceum Fries, Syst. Myc., III., p. 141. 



1873. Badhamia panicea (Fr.) Rost., Fuckel, Sym. Myc. Nachtr., 2, p. 71. 



Sporangia gregarious or aggregated in closely compacted 

 clusters, globose or hemispherical, sessile, the peridium thin, 

 transparent, thickly dotted with white calcareous scales; stipe 

 none; columella none, although a pseudo-columella sometimes 

 appears, formed by a more dense development of the capilli- 

 tium near the centre of the sporangium below ; capillitium 

 abundantly developed, quite uniformly thickened, but showing 

 an occasional delicate connecting thread, the nodes also some- 

 what flattened and enlarged; spore-mass black; spores by 

 transmitted light bright violaceous brown, minutely roughened, 

 10-13 /jt,. Plasmodium is said to be white. 



This seems to be a purely western species. Specimens are 

 before us from western Iowa and from South Dakota. It is 

 very well marked, though liable perhaps to be mistaken at 

 first sight for sessile phases of P. ncfroideum Rost. or P. 

 cinereum Batsch. The capillitium is, however, at once 

 determinative. 



3. BADHAMIA SUBAQUILA Macbr. n. s. 



Sporangia closely gregarious or crowded, globose or sub- 

 globose, sessile, brown, the peridium a thin but persistent 

 brown membrane, rupturing above irregularly and remaining 

 as a cup after spore dispersal; hypothallus none; capillitium 

 strongly developed, thoroughly calcareous, the meshes large, 



