78 TESTACEOUS MOLLUSCA. 
L. Tigertna. Desh.—Venus T. Lin. 1133.—D. p.191.— 
W. t. 8. f. 75.—Mont, t. 4. f. 1.—Ch.f. 390, 1.—#. 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 striz ; 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. 
—Cyrtu. Inrerrurptra. Lam. 52. The longitudinal strize only 
on the sides, and within greenish yellow, without any rosy tinge on 
the margin. Senegal.} 
L. Scaspra. Gray. Ann. Phil. 25.—Teviina 8. D. p. 96. 
—Ch. f. 1943, 4.—W. t. 4. f. 72. Sub-orbicular, ventral margin 
semicircular, dorsal straighter, convex, inflected on both sides, pos- 
terior inflection the larger : white and strongly striated tranererties 
hinge with one cardinal tooth, and two strong lateral ones, which 
shut into cavities in the opposite valve. 
L. Guoposa. Gray. Ann. Phil. 25.—Venus G. D.p. 202.— 
Ch. f. 430, 1.—E. t. 285. f. 1.—W. ¢t. 8. f.99. Sub-orbicular, 
ventricose, pellucid, white, with obsolete transverse strize : umbones 
rounded, slopes indistinct, margin entire. 14..14.—Med Sea. 
L. Sprnirera.—VeENvs 8. Mont. p. 577. t. 17. f. 1.—W. t. 
7. f. 11.—D. p. 163.—Myrrea 8. 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 forma 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. }..3%5.— England. 
L. Zevanica. 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. Spuaroives. 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. 
