MAZATLAN UNIVALVES 371 



ate. The colour varies from light buff to pink and dark violet 

 purple, the latter prevailing. The posterior beak is broadly keel- 

 ed outside. The largest sp. measures long. '63, lat. '23, alt. '15. 

 A short sp. '43, '17, '12. 



A young, acuminate sp. '38, '11, "07. 



Hob. Panama ; rare, on Gorgonia (the various colours of 

 which are imitated by the shell,) at low water mark of 

 spring tides ; C. B. Adams. Mazatlan ; rare ; L'pool. Col. 

 San Juan, L. CaL, Lieut. Green. Sta Barbara, Col. Jewett. 

 Tablet 1733 contains 8 sp. displaying the principal differences, 

 kindly presented by J. Hibbert, Esq. of Liverpool.* 



FAMILY CYPE^IDJE. 

 GENUS CYPB^EA, Linn. 



Cyprsea, Linn. pars. Shell comparatively thin, cylindrical, 

 faintly callous at the sides. 



436. CYPILEA EXANTHEMA, Linn. 



Syst. Nat. ed. 12, p. 1172. Wood. Ind. Test. pi. 16, f. l.Dillw. 

 Desw\ Cat. vol. i. p. 436, no. 1. Gray, Monogr. Cypr. Zool. 

 Journ. vol. i. p. 139 : Descr. Cat. p. 2, no. 7. Soiv. Conch. 

 HI. f. 170.^T^. Icon. Condi, p. 71, no. 62, pi, 4, 5, (f. 1.) 

 9, 10, (f. 1.) 21, (f. l.)-Rve. Conch. Ic. pi. 5, sp. 16. Lam. 

 An. s. Vert. vol. x. p. 489, no. 2. (For other references, 

 v. Desk, in loco.) 



Jun. = Cyprsea zebra. Linn. p. 3400, no. 8. et auct. antiq. 

 + Cypraea cervinetta, Kien. Icon. Conch, p. 74, pi. 6, f. 1, 2. 

 Desk, in Lam. An. s. Vert. vol. x. p. 547, no. 71. =C. exan- 

 thema, Hinds, Voy. Sulph. Moll. p. 6, (teste C. B. Ad.) 

 = C. exanthema, var. a & b. Gray, Zool. Journ. vol. i. p. 139. 

 = C. cervus, var. Rve. Conch. Ic. (teste C. B. Ad.) 

 Comp. Cyprsea cervus, Linn. Mant. p. 548. Rve. Conch. Ic. 

 pi. 2, sp. 6. = Cypraea cervina, Lam. loc. cit. no. 1. Gray, 

 p. 140. Sow. f. 175. Kien. pi. 2, 3. Rve. Conch. Syst. vol. ii. 

 p. 263, pi. 287, 288, f. 175. 



The form C. cervinetta was distinguished by Kiener, who 

 regarded it as from the W, Indies and Senegal ; and was 

 allowed with hesitation by Deshayes, who says that it is per- 

 haps only an intermediate variety between the C. exanthema 



