NEW DIMORPHOMYCETEAE. 237 



of the latter. The primary appendage similar to the secondary, 

 undifferentiated, tapering; the distal portion proliferous through a 

 collar above the fifth or sixth cell. Axes of the appendages and peri- 

 thecia coincident in general with those of the cells which hear them. 

 Perithecia subfusiform, straight, subsymmetrical, the stalk not 

 abruptly distinguished and about as long as the ascigerous portion; 

 the termination blunt, rather broad, unmodified. Perithecia 75-120 

 X 20-25 /x. Receptacle 40-60 X 16-25 /i. Appendages longer 100- 



150 m. 



On the elytra and inferior surface of Strongyliiim sp. No. 2353, 

 Kamerun, West Africa. 



The species is more nearly allied to D. Pcltoidis and D. achrnfifiosus. 

 from both of which it is, however, abundantly distinct. The append- 

 ages are rigid and often distally attenuated, the distal portion being 

 usually distinguished by a collar formed through the disorganization 

 of the outer walls, visually above the fifth or sixth cell, the lumen of 

 this portion being very small. 



Dimeromyces Amarygmi nov. sp. 



Male individual hyaline or faintly yellowish, erect, rather slender; 

 the receptacle consisting of about ten flattened cells, the upper three 

 or four somewhat oblique; the terminal cell, and one to six or seven 

 of the cells below it, giving rise to antheridia. Antheridia suberect, 

 or but slightly divergent, the stalk-cells small and well defined; the 

 neck nearly as long as the venter and rather strongly bent outward. 

 Primary appendage simple, the distal portion slender, usually longer 

 than the receptacle. Antheridia 25-30 X 7-8 ju; receptacle 45-55 

 X 7-12 yu; primary appendage 55-85 ^i. 



Female individual pale yellowish. Receptacle erect, or bent but 

 slightly distally; consisting of from twelve to eighteen cells; the 

 upper three or four oblique, the rest more flattened, all except the 

 lowest usually giving rise to simple secondary appendages or perithecia. 

 Appendages rather closely septate below, the upper longer and distally 

 attenuated; one or more of the lower usuallv bent characteristicallv 

 downward to the substratum: the primary appendage similar, l)ut 

 shorter than those below it. Perithecia one or several, straight, 

 nearly symmetrical, increasing in diameter slightly and continuously 

 from the insertion of the stalk to the tip-region; which is clearly 

 distinguished by slight elevations on either side, whence it tapers 



