304 PROCEEDINGS OF THE AMERICAN ACADEMY. 



protrusion, which subtends either the single perithecium, or a several- 

 celled appendage similar to the primary one. Perithecium solitary, 

 colorless, somewhat elongate, tapering but slightly to the more or less 

 abruptly distinguished rather broad somewhat flattened tip. Total length 

 to tip of perithecium G5-75 p. Perithecium 50-GO X 12^. Spores 

 about 18 X 12ju. 



Ou the elytra of Labia minor Burm., Cambridge, Mass. 



Dimeromyces minutissimus now sp. 



Male individual. Receptacle consisting of three cells, the basal 

 externally suffused with blackish-brown, and projecting beneath the base 

 of the antheridium ; the subbasal giving rise to the solitary antheridium ; 

 while the distal is separated by a blackened septum from a two-celled 

 erect rigid distally spinose appendage. Venter of antheridium small, 

 tapering gradually to the stout outcurved neck. Total length, iucluding 

 foot, 32 /a. Antheridium 1G X 5 fi. 



Female individual. Receptacle very irregularly formed, externally 

 blackened above the large foot; consisting of several irregularly super- 

 posed cells, the subbasal giving rise to a two-celled prominence subtend- 

 ing a blackish tapering appendage, which projects at right angles to the 

 colorless primary appendage ; the latter two-celled, distinguished by a 

 blackish septum, and often subtended by a similar appendage from the 

 same (distal) cell of the receptacle. The single perithecium rather short 

 and broad, tapering slightly to the more or less distinctly differentiated 

 somewhat truncate tip. Length to tip of perithecium 50 «. Longest 

 appendage 40-50 ju. Perithecium 34 X 10 ft. 



On the inferior surface of the rhabdites of Labia, minor Burm.. Cam- 

 bridge, Mass. 



These two species may prove merely variations of the same form due 

 to the differences in their position of growth, and are only provisionally 

 separated. 



Monoicomyces Leptochiri nov. sp. 



Receptacle consisting of a main axis of superposed cells, usually long 

 and slender, normally simple, sometimes once to several times branched, 

 the whole structure apparently a branch from the subbasal cell of a small 

 primary receptacle : the axis somewhat similar to that of Rhachomyces, 

 consisting of a series of superposed cells, variable in number (about 

 twelve to twenty-live), each of which bears on one side, so as to form a 



