384 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Female individual. General structure like that of the male; the 

 base of the rhizoid shorter and relatively broader with very thick walls, 

 the rhizoid proper, simple. Corticating cells of the basal cell vertically 

 elongated, closely associated in a double crest-like series, bearing two 

 or three to fifteen perithecia. The latter yellowish more or less dis- 

 tinctly tinged with brown, the stalk rather slender and clearly dis- 

 tinguished, about one third as long as the body of the perithecium 

 which is rather short and stout, subfusiform; the apex blunt and 

 relatively broad, crowned by four more or less clearly defined promi- 

 nences which surround the short rounded or slightly sulcate apex. 

 Perithecium, including stalk, 90-110 /x. The main body 60-80 X 

 20-28 fx. Total length of rhizoid about 90-100 fi the slender portion 

 about 7 At in diameter. 



On various parts of Lipeurus sp. on Buzzard, Los Amates, Guate- 

 mala, No. 1547. On L. celer, Nos. 1564-67, California (Kellogg, Nos. 

 20a, 684c, 39a). 



This species is clearly distinguished by the horizontal arrangement 

 of its perithecigerous cells and by its simple rhizoid. It is somewhat 

 variable in size, the specimens from Guatemala producing a greater 

 number of smaller perithecia than those from California. The ap- 

 pendage which also lies horizontally is usually quite hidden or broken 

 ofi", and appears to be rather narrow, the distal cell larger. 



Trenomyces Laemobothrii nov. sp. 



Male individual. Corticating cells extending but slightly below 

 the subbasal cell, the lower two thirds of the basal cell quite free, 

 the latter thick-walled, somewhat broader distally, about as long as 

 broad. Antheridia of the usual form suberect in a compact group, 

 six or more in number, the stalk-cells rather long, broader distally 

 and not abruptly distinguished from the body. Appendage relatively 

 very large, the cells subequal, broadly rounded, the apiculus hardly 

 distinguishable. Basal cell 18 X 18 /x. Appendage 28 X 18 m- An- 

 theridia including stalk 45-50 X, the body 12X25mj including 

 efl^erent tube. 



Female individual. Basal cell rather large and rounded, more or 

 less completely corticated, except at the base where the ends of the 

 corticating branches may be clearly visible. Perithecia about six 

 in number, rather slender, subfusiform, the stalk relatively short, 

 not distinguished from the body, the tip large, its margins slightly 

 convex, but otherwise not distinguished from the main body; the 



