MAZATLAN UNIVALVES 373 
cervinetta, spots small, numerous; the other richly coloured, 
approaching C. Scotti, 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 intricata. 
Suseenus LUPONTA, Gray. 
Zool. Journ. 1832, vol. i. p. 1:—Proc. Zool. Soc. 1847, p. 143. 
H. & A. Ad. Gen. vol.i. p. 266. This group includes the 
Pyriform Cypree, (C. tigris, &c.) 
437. Luponta ?spurca, Linn. 
Cyprea spurca, Syst. Nat. ed. 12, p, 1179.—Gray, Mon. Cypr. 
Zool. Journ. vol. i. p. 501, no. 71.—Sow. Coneh. Ill. sp. 51, 
f. 53, 81. 104.—ien. Icon. Conch. p. 30, f. 1.—Rve. Conch. 
fe. pl. 14, sp. 68. 
=C. flaveola, Zam. An. s. Vert. vol. x. p. 525, no. 42, (non Linz.) 
=C. acicularis, Gmel. p. 3421, no. 107. 
This little shell may be a dwarf specimen of the Atlantic 
species (as the authorities have decided; in which case it is 
difficult to say how it got into the box of C. arabicula ;) or it 
may be an allied Pacifie form. It has rounded pits along the 
Jabral 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 yellow 
in front. Long. °84, lat. °5, alt. °39. 
Hahb.—(C. spurca) Mediterranean, auct.—Canaries, M’ Andrew. 
—? Mazatlan ; 1 small sp.; LZ’pool Col. 
Tablet 1748 contains the specimen. 
Suscenus ARICIA, Gray. 
HT. & A. Ad. Gen. vol. i. p. 265.—Shell greatly thiekened at 
the sides, base flattened, back gibbous. 
438. ARICIA ARABICULA, Lam. 
Cyprea arabicula, Zam.in Ann. Mus. vol. xvi. no. 54, p. 100 :— 
An. s. Vert. vol. x. p. 5384, no. 54.—Gray, Zool. Journ. vol. i. 
Oct. 1856. ie 
