THAXTER. NEW LABOULBENIACEAE. 11 



blackish brown below. Fertile branches two or more, usually four, each 

 consisting of a single cell which bears an antheridium terminally and a 

 peritheciura subterminally : the primary branches normally two, lateral 

 and symmetrical, edged externally with blackish brown, the blackening 

 contrasting and continuous with a similar coloration which extends to 

 the tip of the primary antheridium : the secondary fertile branches 

 arising, when present, between the primary and resembling the latter, 

 except for the absence of the black discoloration ; the whole group of 

 branches forming, with their closely crowded antheridia and perithecia, 

 a compact fan-like usually symmetrical tuft. Antheridia relatively long, 

 suffused with smoky brown, more deeply blackish externally, the sec- 

 ondary ones with a more or less conspicuous foot-like blackened base ; 

 the stalk clearly two-celled, shorter than the n^ain body ; two of the 

 distal cells growing upward to form the two unequal terminal append- 

 ages, which are smoky brown, darker about their blackened basal septa, 

 the cells immediately below them projecting upward very slightly on 

 either side. Perithecia furnished with variably developed stalk-cells 

 the bases of which are blackened, but which are otherwise hyaline, as 

 is the rest of the rather short, often stout, subconical, bluntly pointed 

 perithecium. Perithecia GO-75 X 22-25 /i ; the stalk-cell 12-55 /x. An- 

 theridia, including stalk, -35 /x, the appendages 35-50 /x. Total length 

 100-1 60 /x. 



At the tip of the abdomen of Calodera sp. and of Tachyusa sp. ; 

 Intervale, N. IT., No. 1357. The hosts frequenting fleshy fungi. 



HERPOMYCES nov. gen. 



Sexual organs normally separated on different individuals. Antheridia 

 simple. 



Male individual consisting of several (four) superposed cells termi- 

 nated by a characteristically modified spinous or small foot-like process 

 or by both ; the basal cell attached by a small normal foot : one or 

 more of the distal cells giving rise to short branches which may bear 

 from one to several antheridia terminally, or become more or less 

 copiously branched; the branchlets terminated by antheridia, or in some 

 cases sterile. Antheridia long, ilask-shaped. The subbasal cell of the 

 receptacle sometimes producing a fertile branch as in the female indi- 

 vidual from which are produced secondary receptacles which give rise to 

 anthoridiul branches. 



Female individual consisting primarily, as in the male, of several super- 

 posed cells similarly modilifd at the tip, and attached by a small normal 



