MAZATLAN UNIVALVES 373 



cervinetta, spots small, numerous ; the other richly coloured, 

 approaching C. Scottii, with exanthemoid aperture, deeply 

 scooped columella, large spots, labial teeth prominent to the 

 nail. — 1744, 3 sp. shewing variations in character of aperture, 

 narrow to broad. — 1745, 3 sp. shewing variations in posterior 

 callosities, spire prominent or concealed. — 1746, 1 sp. repaired 

 after fracture.— 1747, 1 sp. glossy outside, but with the blue 

 interior most beautifully spangled with Spirorbis, Vermilia & 

 Defrancia iutricata. 



Subgenus LXJPONIA, Gray. 



Zool. Joum. 1832, vol. i. p. 1 —Proc. Zool. Soc. 1847, p. 143.— 

 H. Sf A. Ad. Gen. vol. i. p. 266. This group includes the 

 Pyriform Cypraeaj, (C. tigris, &c.) 



437. LupONiA PspuRCA, Linn. 



Cypra^a spurca, Syst. Nat. ed. 12, p, IVi^.—Gray, Mon. Cypr. 

 Zool. Joum. vol. i. p. 501, no. 1\.— Soxo. Conch. III. sp. 51, 

 f. 53, 81, 104.— ir«ew. Icon. Conch, p. 30, f. l.—Rve. Conch. 

 Ic. pi. 14, sp. 68. 



= C. flaveola, Lam. An. s. Vert. vol. x. p. 525, no. 42, (non Linn.) 

 = C. acicularis, Gmel. p. 3421, no. 107. 



This little shell may be a dwarf specimen of the Atlantic 

 species (as the authorities have docided ; in which case it is 

 difficult to say how it got into the box of C. arabicula ;) or it 

 may be an allied Pacific form. It has rounded pits along the 

 labral side, and a few at the top and bottom of the labial. One 

 turn of the spire is seen. Colour resembling C. stercoraria on 

 the back ; orange brown at the sides ; light brownish yeUow 

 in front. Long. '84, lat. '5, alt. "39. 



JIab.— {C. spurca) Mediterranean, auct.— Canaries, M' Andrew. 

 — PMazatlaa ; 1 small sp. ; L'pool Col. 

 Tablet 1748 contains the specimen. 



Subgenus AEICIA, Gray. 



H. Sf A. Ad. Gen. vol. i. p. 265.— Shell greatly thickened at 

 the sides, base flattened, back gibbous. 



438. Aeicia akabicula, Lam. 



Cypraa arabicula. Lam. in yLnn. Mns. vol. xvi. no. 54, p. 100: — 

 An. s. Vert. vol. x. p. 531, no. 5i.— Gray, Zool. Joum. vol. i. 

 Oct. 1856. a 



