098 CONCHOLOGIA CESTRICA. 
S. simile, SAvy. 
Cyclas similis, Say, Nich. Encyc., Ed. I., 1816. 
S. similis. — [Prime.] 

Shell, transverse-oval, more pointed posteriorly, base 
slightly curved; beaks full, elevated; sulcate, dark 
chestnut; inside bluish; cardinal teeth small, indistinct; 
lateral teeth on a line with the primaries, large, promi- 
ment, El. aa, WW. 07, fa, mall 
Station, running streams. Pickering Creek, Chester 
County ; common. 
S. striatinum, Lam. 
Cyclas striatinum, Lam., An. S. Vert., V., 1818. 
S. striatinwm. — | Prime. ] 
Fig, 198, 

Shell, thin, inequilateral, rounded anteriorly, posteri- 
orly elongated; sulcations slight, or irregular; color 
light or darker shades of green; interior blue; hinge 
margin curved; cardinal teeth very small, lateral larger, 
not prominent. H. 8, W. 11, T. 6, mill, 
