2l6 THE NORTH AMERICAN SLIME-MOULDS 



yellow, sessile ; the peridium thin, transparent, opening irregu- 

 larly above ; hypothallus none ; capillitium bright yellow, not 

 emergent, the threads narrow, 3-4 //., wound with spirals three 

 or four, more or less irregular, smooth, longitudinal ridges want- 

 ing, the apices rather long, acuminate, about twice the diameter 

 of the elater, or anon clavate or even globose, bulbose at the 

 tip and furnished with several stout spines ; spore-mass concol- 

 orous ; under the lens spores colorless, marked by a very feebly 

 developed reticulation of the T. persimilis type, but the bands 

 narrow and, as shown by the narrow " border," low, the meshes 

 few and often imperfect, globose or sub-globose, about 12 p. 



The episporic characters of this species ally it to T. persimilis 

 most nearly. The reticulations are possibly not more divergent 

 from the typical form of that species than are the same features 

 in some other forms there included. But in the present case, 

 added to the episporic sculpture, we must reckon the peculiar 

 capillitial thread, unlike that seen in either of the chrysosper- 

 matous forms, and the gregarious habit without hypothallus. 

 These peculiarities seemed to Dr. Rex distinctive, and as they 

 appear constant they may be left to separate the species. 



10. TRICHIA BOTRYTIS Persoon. 



PLATE XIII., Figs. 8, 8 a. 



1791. Stemonitis botrytis Pers., Gmel., Syst. Nat., II., p. 1468. 



1794. Trichia botrytis Pers., ROM. N. Mag. Bot., I., p. 89. 



1829. Trichia pyriformis Fries, Syst. Myc., III., p. 184. 



1803. SpJicerocarpus fragilis Sowerby, Eng. Fung., I., p. 279. (?) 



1875. Trichia fragilis (Sow.) Rost., Man., p. 246. 



1846. Trichia lateritia LeV., Ann. Set. Nat., 3, V., p. 167. 



Sporangia gregarious, scattered, sometimes combined in clus- 

 ters, pyriform or turbinate, stipitate, red purple or ochraceous 

 brown, the peridium breaking up irregularly, the dehiscence 

 sometimes prefigured by pale reticulations on the surface ; stipe 

 solid, single, or united in clusters of five or more together, dark- 

 colored, red or purple brown, opaque ; capillitium orange, ochra- 

 ceous yellow, or even red or reddish brown, the threads simple 



