148 TESTACEOUS MOLLXJSCA. 



other, with eighteen imbricated and scaly ribs ; within with a 

 brown or violet spot anteriorly or covering the surface, the lateral 

 tooth rather acute. 1-i. — Mediterranean ? 



C. CoNCAMERATA. Lam. 19.— Chama C. im. 3304.— J>. p. 

 219.— CA./. 506.— J^. t. 234./. 6.— IF. f. 9./. 15. Ovate oblong, 

 whitish within and without, with longitudinal ribs which are trans- 

 versely striated and somewhat crenated ; the inner margin con- 

 tracted and appearing as if doubled over in the middle so as to form 

 an opposite ovate chamber in each valve, g . . ^. — W. Indies. 



C. Aviculina. Lam.2Q.—Del. t. 11./. 10. Ovate oblong, 

 with (in the largest specimens) orange spots on the ribs ; the longi- 

 tudinal ribs armed with imbricated scales which become arched and 

 semi-erect as they recede from the beaks ; inside white. 1. — New 

 Holland. — {Very dose to, and -possibly a variety of, Lamarcli's 

 Cah/cnlata.) 



C. CiTRiNA. Lam. 2\. Oblong spatulate, citron yellow, the 

 longitudinal ribs crowded with imbricated scales which are more 

 erect towards the margin and at the posterior extremity ; white 

 within. A. — New Holland. — {Probably a young Crassicosta. 

 Desh.)i 



C. SuBL^viGATA. Lam. 22. Oval oblong, with white and 

 rufous zones and irregular rays, with very delicate transverse striae 

 and the mai-gin quite entire. |. — {Li shape and hinge resembling 

 a Cypricardia. — Desh.) 



C. CoRBULARis. Lam. 2Z. Oval, somewhat trapeziform, thin, 

 smooth, posterior side very short ; margin quite entire. ^. — On 

 CoraJlines. 



C. LiTHOPHAGELLA. Lam. 24. — Del. t. 11. /. 11. Oblong, 

 cylindraceous, thin, compressed towards the margin, anteriorly 

 dilated and obtusely truncated, ventral and ligamental edges sub- 

 parallel and straightish, whitish with the beaks fulvous, very 

 delicately striated transversely : the angle oblique and obtuse. 

 ^.—Enrope? — Having the aspect but not the hinge of Cypri- 

 cardia Coralliophaga. 



C. Radiata. Sofv. Z. P. \S2,2.— Reeve. Ic. t. \.f. 5. Oblong, 

 palish, variegated with fuscous spots and bands ; the posterior side 



1 I have not seen this species, but from its description, it seems 

 allied to, if not identical with, the C. Squamosa. Sow. Tank. Cat. 

 -An. E. t. 234./ 3. Oblong, variable in colour being white 

 orange-red, &c,, but never spotted, armed with sixteen scaly radiat- 

 ing ribs ; the scales semi erect and much more crowded on the 

 narrower and closer posterior ribs ; ventral edge but slightly waved, 

 not sinuated. f . . 1^. — Senegal. — See my note on Crassicosta of 

 which species this is possibly a variety. 



