64 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



C. Botrytis Menegh., Figs. 115, 116. 



C. Broomei Thwaites, Figs. 99, 258. 



C. suborbiculare Wood, Fig. 113. 



C. granatum Breb., Fig. 109. 



C. crenatum Ralfs, Fig. no. 



C. contractum Kirch., Fig. 117. 



C. tumidum Lund., Figs. 100, iooa. 



C. ornatum Ralfs, Fig. 102. 



C. ovale Ralfs, Fig. 245. 



C. undulatum Corda, Fig. 244. 



C. pyramidatum Breb., Fig. 246. 



C. Meneghinii Breb., Fig. 247. 



C. octhodes Nord., Fig. 248. 



C. perforatum Lund., Fig. 249. 



C. Ndgelianum Breb., Fig. 250. 



C. intermedium Delp., Fig. 251. 



C. Portianum Arch., Fig. 252. 



C. orbiculatum Ralfs, Fig. 253. 



C. tetrophthalmum (Kiitz.) Breb., Fig. 254. 



C. galeritum Nord., Fig. 255. 



C. Cucurbita Breb., Fig. 256. 



C. pseudobroomei Wolle, Fig. 257. 



Xanthidium Ehrb. Cells single, or two joined end to 

 end ; deeply constricted ; semi-cells wider than long, entire, 

 furnished with spines, and with a round, truncate, or toothed 

 arm projecting from the centre. The spines are either simple 

 or with two or three forks at the end. In the centre of each 

 semi-cell is a roughened protruding area of variable size. 

 Zygospores spherical and spinous. 



X. fasciculatum (Ehrb.) Ralfs var. subalpinum Wolle, 

 Figs. 121, 266. 



X. antilopceum (Breb.) Kiitz., Fig. 262. 



X. cristatum (Breb.) Ralfs, Fig. 265. 



X. aseptum Nord., found but not figured. 



Sphaerozosma Corda. Filaments of cells closely united 

 by a narrow isthmus or by a granular process. Cells deeply 

 constricted, thus forming bilobed cells. 



5\ Uliforme Rab., Figs. 118, 119. 



