MAZATLAN UNIYALVES 371 



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

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

 ed outside. The largest sp. measures ZoH^r. "63, lat.'2'i, ali. '15. 



A short sp. „ '43, „ "17, „ '12. 



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



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

 which are imitated b}'' the shell,) at low water mark of 

 springtides; C.B.Adams. — Mazatlan : rare; L' pool. Col. — 

 San Juan, L. Cal., Lieut. Green. — Sta Barbara, Col. Jeioett, 



Tablet 1733 contains 8 sp..displaying the principal difierences, 

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



Family CYPR^ID^. 



Genits CYPE^A, Linn. 



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

 faintly callous at the sides. 



436. Ctpejea exanthema, Linn. 



Syst. Nat. ed. 12, p. 1112.— Wood. Ind. Test. pi. 16, f. l.—Billw. 

 Descr. Cat. vol. i. p. 436, no. 1. — Gray, Monogr. Cypr. Zool. 

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

 m. f. m.—Kien. Leon. Conch, p. 71. no. 62, pi, 4, 5, (f. 1.) 

 9,10, (f.l.) 21, (f. l.)-i2i'e. Conch. Le. p]. 5, sp. 16.— iam. 

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

 V. Desh. in loco.) 



Jun. = Cypr8ea zebra. Linn. p. 3400, no. 8. et auct. antiq. 



+ Cypraea cervinetta, Eien. Leon. Conch, p. 74, pi. 6, f. 1, 2.— 

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

 thema, Eind.'i, Voy. Sitlph. Moll. p. 6, (teste C. B. Ad.)— 

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

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



Comp. Cypraea cervus, Linn. Mant. p. 548. — Rve. Conch. Lc. 

 pi. 2, sp. 6. — = C.>'pr8Da cervina. Lam. loc. cit. no. 1. — Gray, 

 p. 140.— &?('. f. VIb.—Kien. pi. 2, Z.—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 Deshaj^es, who says that it is per- 



h aps only an intermediate variety between the C. exanthema 



