186 PROCEEDINGS OF THE AMERICAN ACADEMY 



described as C furcatus and C contortus, together with a third related 

 form as yet undescribed, differ from other members of the genus in the 

 much smaller number of cells iu each of the four cell rows composing 

 the wall of the perithecium, although the number, which finds its maxi- 

 mum in C. rostratus, is also very greatly reduced in C. mim'sculus. 

 The spores of the two first mentioned species are also peculiar, in that 

 the septum also divides the hyaline envelope. In all the species the 

 trichogyne arises from the angle formed between the perithecium 

 and the antheridial appendage. In a few specimens two perithecia 

 arise side by side, each associated with an appendage ; but this con- 

 dition seems decidedly exceptional. It should be observed also that 

 two species, C. rostratus and 0. capillaris, are without the perithecial 

 appendage peculiar to the remaining species. 



Ceratomyces contortus, nov. sp. 



Hyaline becoming very faintly brownish. Receptacle consisting of 

 three superposed cells above which three cells form the general base 

 of the perithecium and appendage. Perithecium long and slender, 

 usually constricted at the base, slightly inflated and bent outwards, the 

 apex pointed and curved. A short appendage arises sublaterally 

 below the apex and is strongly curved, extending inwards beyond the 

 apex, its fifth and sometimes also its sixth cell producing from its upper 

 surface a stout branch which may be simple or may bear a few second- 

 ary branches at irregular intervals. Antheridial appendage consisting 

 of about twelve superposed cells, producing a few branches from its 

 inner side at irregular intervals, the branches in turn more or less 

 irregularly branched. Spores 80-85 X 3-3.5 /n. Perithecia 200-260 

 X 35-45 /i. Receptacle about 125 /x long. Antheridial appendage 

 110-130 /x. Perithecial appendage 75 /x long. 



On inferior surface of abdomen of Berosus striatus Say, Maine. 



Ceratomyces furcatus, nov. sp. 



Hyaline becoming more or less suffused with reddish brown, the 

 appendages sometimes purplish. Receptacle composed of three or 

 four superposed cells, surmounted by two cells from which arise the 

 perithecium and appendage. Perithecium large and stout, externally 

 nearly straight, inwardly inflated and strongly curved to the pointed 

 apex below which arises externally and sublaterally a large stout flexed 

 appendage, tapering and bearing towards its tip a single row of short 

 branches which may be in turn once branched. Cell rows of perithe- 



