78 TESTACEOUS MOLLUSCA. 



L. Tigerina. Desk.— Venus T. Lin. 1133.— D. p. 191.— 

 W. t. 8.f. 75.— Mont. t. 4./. l.—Ch.f. 390, \.—E. t. 277. f. 4. 

 Cytherea T. Lam. 53. Orbicular, compressed, white, with 

 longitudinal ribs which are rather flat, very close, narrow, and nu- 

 merous, and are crossed by still closer set concentric striae ; lunule 

 minute, triangular sunken, ligament buried : within white, with 

 often a tinge of rose-colour on the hinge and margin : hinge with 

 two primary teeth in each valve, a lateral tooth in one and a recep- 

 tacle for it in the other. Diam. up to 2. — West Indies. — Variety. 

 — Cyth. Interrupta. Lam. 52. The longitudinal striae only 

 on the sides, and within greenish yellow, without any rosy tinge on 

 the margin. Senegal. 1 



L. Scabra. Gray. Ann. Phil. 25. — Tellina S. D. p. 96. 

 — Ch.f. 1943, 4. — W. t. 4./. 72. Sub-orbicular, ventral margin 

 semicircular, dorsal straighter, convex, inflected on both sides, pos- 

 terior inflection the larger : white and strongly striated transversely: 

 hinge with one cardinal tooth, and two strong lateral ones, which 

 shut into cavities in the opposite valve. 



L. Globosa. Gray. Ann. Phil. 25. — Venus G. D.p. 202. — 

 Ch.f. 430, 1.— E. t. 285. /. 1.— W. t. 8.f. 99. Sub-orbicular, 

 ventricose, pellucid, white, with obsolete transverse striae : umbones 

 rounded, slopes indistinct, margin entire. 1^ . . 1^. —Med Sea. 



L. Spinifera. — Venus S. Mont. p. 577. t. 17. f. 1. — W. t. 

 7.f. 11.— D. p. 163.— Myrtea S. Turt. B. p. 133.— F. p. 

 443. Oval, subtriangular, yellowish white, with numerous fine 

 laminar equi-distant transverse ridges, which reflect a little, and in 

 both valves become anteriorly confluent in pairs, extending beyond 

 the edges, so as to form a fringe of short obtuse spines, which 

 turn back and form a cavity for the cartilage ; beak small, sub- 

 central, lunule long and narrow : in one valve a single cardinal 

 tooth, and a lateral on each side, in the other two cardinal, and the 

 lateral obscure. ^,.-rV — England. 



L. Zelanica. Gray in Yates, New Zeal. Sub-orbicular, 

 rather compressed, rather solid, opaque, white, smooth, very slightly 

 concentrically striated, and covered with a thin smooth periostraca. 

 — New Zealand. — Like, but more compressed and opaque than L. 

 Lactea. 



L. Sph^eroides. Conr. Jour. A. N. S. Phil. 6. t. 11. f. 9, 

 10. — Ch.f. 130. Globose, white ; ribs divaricating, triangular and 



1 Sowerby and Deshayes have with justice removed this shell, with 

 the preceding species, from Cytherea, the palleal scar being simple, 

 and not sinuated as in that genus : neither indeed does it possess 

 four teeth in one valve ; though as regards the hinge I fear it is no 

 more a Lucina than it was a Cytherea. 



