NEW DIMORPHOMYCETEAE. 249 



Dimeromyces appendiculatus nov. sp. 



Male individual faintly tinged with yellowish. Receptacle short 

 and broad, foot large; basal cell flattened, extending upward on the 

 anterior side above the base of the stalk-cell of the lower of the two 

 antheridia; which arise from the distal and subbasal cells: that from 

 the latter, with long stalk-cell, which bears it higher than the upper 

 curved backward or sidewise, almost at right angles. Appendage 

 long, slender and about five-celled above the large basal cell. Re- 

 ceptacle 19 X 20 fjL. Antheridia, upper 35 fx, lower 45 fx. Append- 

 age, longest examined, 45 ^t. Total length to tip of lower antheridium 

 including foot 60 /i. 



Female individual pale yellowish. Receptacle as in the male, but 

 four-celled, the lower cells becoming somewhat distorted and mis- 

 placed, the basal also forming a narrow margin which extends up to 

 the end of the basal cell of the secondary appendage to which it is 

 adherent. Both appendages similar, slender, tapering slightly. 

 Perithecium relatively very large, sessile, larger at the base, tapering 

 gradually, bent or curved inward or arcuate; the tip somewhat nar- 

 rower and well distinguished; the apex subtended by a slight indenta- 

 tion bearing a short tooth-like projection on one side and a long slender 

 usually upcurved distally clavate appendage on the other. Perithecia 

 115-150 X 14-17 iJL, its appendage 40-50 X 7.5 ju at tip. Receptacle 

 15 X 22 /x (exclusive of large foot). Appendages longest, 95 /x. 

 Total length to tip of perithecium 135-170 fx. 



On the antennae of Lciochrodes mcdianus Westw. and Lciochwdcs 

 sp., Xos. 2996-98, Auki and Fulakora, Solomon Islands (Mann Coll.). 



The very peculiar receptacle and perithecial appendage clearly 

 distinguish this species. The cells of the former become so displaced 

 by growth that it is usually almost impossible to determine their 

 limits. The extension upward of the anterior edge of the basal cell 

 to form a margin gives the receptacle a characteristic appearance. 



Dimeromyces rigidus nov. sp. 



Male individual yellowish, becoming dark brown. Receptacle 

 consisting of from five to seven cells, those above the basal oblique and 

 much flattened, especially below, both margins convex; the basal cell 

 of the primary appendage rather abruptly narrower, and like the 



