380 



MONOGRAPH OF TIIE LABOULBENIACE^E. 



tioned under the preceding species, to which it is most nearly allied. As already stated, its 

 spores are peculiar for the constriction ahout their septum, which involves the gelatinous 

 envelope. 



Ceratomyces humilis Thaxter. Plate XXV, figs. 11-14. 



Proc. Am. Acad. Arts aiid Sci. Vol. XXIX, p. 94. 



Hyaline, becoming faintly tinged with brownish. Perithelium rather narrow, without any 

 appendage, the apex blunt or nearly truncate, its cell-rows composed of not more than seven 

 cells. Receptacle composed of from two to five superposed squarish cells. Appendage consist- 

 ing of six to twelve superposed cells, the series tapering distally and producing irregularly from 

 its inner face branches which may in turn be several times branched and may reach a length 

 twice that of the perithecium. Spores, 22 X 3 p. Perithecia, 100 x 25 p. Total length to tip 

 of perithecium, 150-185 ix. Longest branches of appendage, 180 fi. 



On Berosus striatus Say, Kittery Point, Maine. 



A somewhat insignificant species allied to O. contortus, from which it is easily distinguished 

 by its small size and by the absence of any appendage near the tip of the perithecium. It occurs 

 more frequently between the terminal claws of the middle pair of legs, but is rarely found on the 

 elytra. In two specimens the perithecia have become distinctly tinged with brown, but as a rule 

 the whole plant is hyaline. 



