182 PROCEEDINGS OF THE AMERICAN ACADEMY 



selves once or twice branched, the branches as a whole diverging 

 slightly, the inner members of the group hyaline, the outer more 

 or less deeply suffused with brown. A few additional short simple 

 branches may also arise from the tip of the distal cell of the receptacle. 

 Receptacle completely suffused and almost opaque, except the basal 

 cell, which is hyaline with a basal brown suffusion. Perithecia 75 X 

 22 /i (not quite mature). Total length of appendages 160 /x or more. 

 Two basal cells of receptacle 38 p. Total length to tip of perithe- 

 cium 150 n or more. 



On upper surface of abdomen of Lathrobium jacobinum Lee, Cali- 

 fornia. 



This species is closely related to the preceding, from which it differs 

 by its proportionately larger opaque receptacle, as well as by the 

 character of its appendages, the main axes being more highly de- 

 veloped though less clearly marked than in G. Cryptobii. 



TERATOMYCES, nov. gen. 



Receptacle consisting of several superposed cells surmounted by a 

 series of smaller cells which surround certain central cells, from which 

 the perithecia arise, and produce distally a circle of appendages from 

 within which the long stalked perithecium is exserted. Perithecia one 

 or more in number, symmetrical, the stalk consisting of an elongate 

 basal and three distal cells. Appendages consisting of one or more 

 superposed cells, each producing externally a single row of branches. 

 Spores as in other genera. 



The dense tuft of appendages in this singular genus completely 

 obscures the base of the stalk of the perithecium so that the structure 

 in this region cannot be made out. The appendages are quite different 

 in character from those of other described genera, the flattened basal 

 or sub-basal cells being closely set externally with peculiar branches 

 corresponding in position to zigzag depressions of the outer surface 

 of such cells. What the limitations of the generic characters may 

 prove to be it is difficult to determine. The antheridia may be repre- 

 sented by short hyaline branches, at the tips of the appendages. 



Tl'.RATOMYCES MIRIFICUS, nOV. Sp. 



Receptacle consisting of three (?) superposed cells, the basal one 

 slender, its upper portion opaque and indistinguishable from the cell 

 above it, which is also almost wholly opaque with a partly hyaline 



