134 CYPRINA. 



operculum of C. coarctata was brought to this country by Mr. 

 Cuming. It is probable, however, that an increased knowledge 

 of facts might go far to establish the separation. C. Testiculus, 

 fig. 412. 



CYPR^EADIA. Sw. A genus of the family " Cyprseidse," Sw. 

 thus described :— " Cyprseform ; the base contracted ; the body 

 whorl not flattened beneath ; shell cancellated ; aperture of equal 

 breadth throughout ; a few thickened, short teeth on the pillar ; 

 lip at the base, which is not internally concave. C. cancellata, 

 Sw. Fossil only, differing from Trivea in its contracted base, in 

 the inequality of its aperture, and the equal convexity of the 

 inner lip within." (Sw. Lardn. Cyclop. Malac. p. 325.) Cyprse- 

 dia, fig. 564. 



CYPRiELA. Sw. A genus formed for the reception of Ovulum 

 verrucosum, Auct. which has a circular depression at each ex- 

 tremity. It is the same as the genus Calpurnus of De Montfort. 

 Ovulum verrucosum, fig. 441. 



CYPRM)VULUM. Gray. A genus of Cyprseidee thus described, 

 " shell like a cowry, but front end of columella covered with 

 regular cross-ribs, like the rest of the base, internally produced 

 into an acute toothed ridge. Shell pear-shaped, cross-ridged.' ' 

 C. capense, fig. 444. South Africa. 



CYPRICAKDIA. Lam. Fam. Cardiacea, Lam. — Bescr. Equi- 

 valve, inequilateral, subquadrate, transversely elongated, with 

 the anterior side very short ; hinge with three cardinal teeth and 

 one remote lateral tooth in each valve ; muscular impressions 

 two in each valve ; ligament external. — Obs. This genus is 

 distinguished from Cardita by the three cardinal teeth. The 

 mollusca of this genus are marine. C. angulata, fig. 125. Pacific 

 Ocean. 



CYPRINA. Lam. Fam. " Conques Marines," or Marine Con- 

 chacea. — Descr. Equivalve, inequilateral, sub -orbicular; umbones 

 curved obliquely ; hinge with three diverging cardinal and one 

 remote lateral teeth in each valve ; ligament external ; muscular 

 impressions two in each valve ; palleal impression having a slight 

 posterior sinus j epidermis thick, rough brown.— Obs. The Cy- 



