21 8 THE NORTH AMERICAN SLIME-MOULDS 



spores yellow, under the lens yellow, minutely and closely 

 warted, globose, 12 \i. 



The spores of this species resemble closely those of the pre- 

 ceding, but the sporangium is at sight different in appearance 

 and proportions and the capillitium not the same at all. The 

 elaters are never fusiform, the apices always abrupt in their 

 acumination, and the sculpture irregular and uneven. In form 

 the elater resembles that of T. scabra. The description is 

 drawn from specimens, N. A. F., 2495, with which, however, 

 specimens received from Dr. Rex and later collected exactly 

 correspond. 



New York. 



12. TRICHIA ERECTA Rex. 



1890. Trichia erecta Rex, Proc. Phil. Acad., p. 193. 



Sporangia gregarious, often in clusters of two or three to- 

 gether, but generally single, nut brown, checkered with broad, 

 conspicuous yellow dehiscence bands, globose, ^ mm. wide, stipi- 

 tate ; stipe double the sporangium, dark brown, solid ; capillitial 

 mass bright yellow, the elaters cylindric, 3-4 //, wide, terminat- 

 ing in apices short and smooth, adorned with spirals, four, 

 coarsely spinulose, winding unevenly or even branching and so 

 united to one another ; spore-mass yellow, spores by transmitted 

 light pale, globose, minutely warted, 12 /u. 



Distinguished at sight by the peculiarly mottled peridium. 

 T. botrytis in its ochraceous forms sometimes shows tendency 

 to the same thing, but the checkered surface is here conspicu- 

 ous. The elaters resemble those of the preceding form, but are 

 remarkably rough. 



Rare. Adirondacks, New York. 



13. TRICHIA DECIPIENS (Pers.} Macbr. 



PLATE IV., Figs. 2, 2 a, 2 b. 



1793. Lycoperdon pusilluin Hedwig, Abh., I., p. 35, Tab. iii., Fig. 2. 



1795. Arcyria decipiens Pers., Ust. Ann. Bot., XV., p. 35. 



1796. TrichiafallaxPers., Obs. Myc., I., p. 59, etc. 



