NEW DIMORPHOMYCETEAE. 225 



septum; the terminal cell dark brown, a single perithecium arising 

 from the cell next the subbasal, the rest producing secondary append- 

 ages consisting usually of three cells, the basal and subbasal subequal 

 and hyaline, the rest of the appendage more or less elongate often 

 slightly narrower above the subbasal cell, purplish brown, tapering 

 more or less to the blunt, or usually rather abruptly enlarged, clavate 

 termination; the successive appendages tending to lie close together 

 and parallel. Perithecium triangular or subtriangular, wholly 

 ascigerous, except for the very short narrow stalk which attaches it by 

 its greater angle; becoming reddish brown, the short apex, only, 

 slightly distinguished, and symmetrically rounded. Perithecia 28-30 

 X 15-17 ^t. Primary appendage 10-12 X 7.5 /x, at base: Secondary 

 40-125 M- Receptacle 22-28 X 11.5 m- 



On the legs of species of Cdacnopsis, No. 2069 (Type) Wainoni Bay, 

 Solomon Islands, and No. 2970, Fulakora. 



This species is most nearly allied to D. clavuliferus and is chiefly 

 remarkable for its triangular perithecium which is shaped somewhat 

 like the ascigerous portion in Diolcomi/ces mallcolaris, and is similarly 

 inserted on its stalk. In the specimens from Fulakora the appendages 

 are longer and more attenuated, none of them ending in the bubous 

 termination which usually occurs in the material from Wainoni Bay. 

 The general appearance of the form, apart from the specific peculiari- 

 ties of its perithecium and receptacle suggests that of Rickia FoDiii- 

 cicola Speg., and it seems not impossible that Spegazzini has not 

 accurately interpreted the characters of the latter, which may 

 possibly prove to be, after all, a species of Dimorphomyces or of 

 Dimcwmyces. 



Dimorphomyces obliqueseptatus nov. sp. 



Male individual pale yellowish. Receptacle consisting of three cells, 

 the basal and subbasal similar, the latter larger, both distally promi- 

 nent, about twice as long as broad, subovoid, distinguished by a slight 

 constriction: appendage usually foiu'-celled, the three basal broad and 

 short, the two middle distinguished by rather deep constrictions and 

 distinct black septa-. Anthei'idia usually two, from the subbasal 

 and terminal cells, nearly sessile and erect, the regions clearly distin- 

 guished; the neck strongly curved outward or even recurved. 

 Receptacle 38^2 X 16 ju- Appendage 30 X 5 m- Antheridia 30 X 

 8.5 ijl. Total length to tip of antheridia (]S ix, of appendage 70 m- 



Female individual pale yellowish or brownish yellow. Receptacle 



