106 A Monograph of the Myxogastres. 



Owing to an oversight, Enerthenema' Berkeleyana was intro- 

 duced by Cooke in Myx. Brit., p. 51, as a native of Britain. 

 This species, so far as I am aware, has only been met with in 

 S. Carolina, and is known by the clustered spores. 



(Rostafinski's Synonyms.) 



Arcyria atra, Schum., Saell., no. 1487; Fl. Dan., t. 4194 



(1803). 

 Enerthenema elegans, Bowm., Trans. Linn. Soc., xvi., p, 151, 



t. 16 (1828). 



Stemonitis mammosa, Fr., iii., 161 (1829). 

 Stemonitis papillata, De Bary, I.e. (1859). 

 Enerthenema phoenicolcpta, Bowm., msc. 



Enerthenema Berkeleyana, Rost. 



Sporangia stipitate, globose, blackish, wall evanescent ; stem 

 black, very thick at the base, conical, becoming contracted into 

 a thin, cylindrical, black columella that reaches to the apex of 

 the sporangium, and there becoming expanded into a disc ; 

 capillitium threads dark, springing from the margin of the disc, 

 pendulous, sparingly forked, rarely joined laterally; spores 

 blackish-purple in the mass, at first in clusters of 4 14, sub- 

 triangular at first, free portion warted, 10 13 p. diameter. 



Enerthenema Bcrkeleyana, Rost., Mon., Append., p. 29 ; Cke., 

 Myx. Brit., p. 51. 



(Type in Herb. Berk., Kew, no. 10888.) 



On boards. South Carolina. 



Closely resembling S. elegans, but distinct in the clustered 

 spores that are warted on the free surface only. The stern is 

 not always thickened below. 



Enerthenema muscorum, Lev. 



Gregarious, black ; stem setaceous, smooth, expanding at the 

 base into a shield-like hypothallus ; sporangium smooth ; tubes 

 of the capillitium springing from the lenticular apex of the 



