1HK GENUS CYTHEREA, OF LAMARCK. 307 



Circe (Schum.) 



Shell ovate, margin entire. Anterior lateral tooth small, hinder 

 hinge tooth two cut. Syphonal inflection none. 



Circe picta, Cyth. picta, Lam. Ency. m. t. 273 f. 2. 



Circe caslrensis, Venus castrensis, Linn. V. australis, Chemn. 

 Cyth. omatu, Lam. Venus Lorenziano, Chemn. xi. f. 1961, 62. 



Circe scripta, Venus scripta, Lam. Var. Cyth. undatina, & Cyth. 

 plicatula, Lamk. 



Circe divaricata, Venus divaricala, Gmel. Cyth. divaricata, and 

 C. testudinaUs, Lank. 



Circe corrugata, Venus corrugata, Chemn. Cyth. rugifera, Lam. 



Circe gibbia, Cyth. gibbia, Lam. 



Circe pectinata, Venus pectinata, Linn. 



Circe numulina, Cytherea numulina, and Cyth. cuneata, Lamk. 



Circe dispar, Venus dispar, Chemn. Cyth. muscaria, C.pulicaris, 

 and C. mixta, Lam. 



Circe arabica, Cyth. arabica, Lamk. Venus lentiginosa, V. bico- 

 lorata, V. arabica, Chemn. V. callipyga, Born. 



Circe Crachrodii — Shell oblong, roundish thick, solid, rather ven- 

 tricose, polished, smooth, with distant concentric grooves in front, 

 and rather irregular striae behind, White, blotched, spotted and 

 marbled with purple brown, hinder side brown varied, inside rosy, 

 edges brown varied, entire. 



In the left valve there is a kind of hinder lateral teeth under 

 the hinder end of the cartilage. 



Circe litturata, n. s. — Shell ovate, cordate, rather ventricose, ra- 

 ther solid, regularly concentrically grooved, white or purplish, 

 with angular red brown lines. Umbones smoothish. Lunule lanceo- 

 late. Inside white, purplish varied, margin entire. — My collection. 



Circe crocea. — Shell cordate, roundish rather convex, slightly 

 concentrically grooved. Yellow, with obscure brown lines on the 

 hinder side : inside yellow, edge entire. — My collection. 



Circe planata. — Shell oblong, subquadrate, rather narrower in 

 front, browner and rounder behind. Compressed, thin, white pellu- 

 cid, smoothish ; very finely and closely concentrically striated ; 

 inside white ; margin entire. — My collection. 



Circe sulcata. — Shell cordate, trigonal, rather compressed, solid. 

 Yellow brown, with two or three brown rays not reaching the 

 umbo, finely radiately striated, and with close, blunt, regular, con- 



