TRIBE NYMPHACEA. 77 
lunule ; inside glossy, hinge with three teeth in one valve (the middle 
one cloven) and two in the other. Diam. 1}. 
L. CotomBetta. Lam. 15.—Sow. G. f. 6—L. ADANSONI. 
D Orb. Mol. Cari.t. 7. f. 26, 7. Sub-orbicular, convex, gibbous, 
transversely grooved and one of the slopes hollowed; beaks mode- 
rately prominent and obliquely curved.— Senegal. 
L. Sinvata.* Lam. 16.—Tevitina Fiexvosa. Mont. p. 72. 
—D. p. 99.—Don. t. 42. f. 2.—W.. t. 4. f. 78.—Cryptopon F. 
Turt. Biv. t.7.f.9, 10.—-Luctna F. Gould. Mas. f. 52. Sub- 
orbicular, convex, thin, pellucid and white ; marked with minute irre- 
gular concentric wrinkles, anda longitudinal furrow extending from 
the apex parallel to the cartilage slope, and forming a deep curve in 
the margin at its termination : hinge with a single obscure penetra- 
ting cardinal tooth. Diam. %.— Atlantic. 
L. Pecten. Lam. 17.—Del. t. 6. f. 8.—/An. L. Bewua. 
Conrad. J. A. N.S. Phil. 7. t. 19. f. 11.? Sub-orbicular, rather 
broader than long, but slightly convex, whitish with small rounded 
transversely striated radiating ribs: inner margin crenulated. 4.— 
Senegal.— Not unlike a cockle. 
L. Lutea. Lam. 18.—Del. t. 6. f. 9. Rounded oval, sub- 
equilateral, rather broader than long, very small, smooth, pellucid, 
canary yellow, no lateral teeth. 2%.—Mauritius. 
L. Dietrauis. Lam. 19.—Del. t. 6. f. 10.—Tewtina Drier- 
TARIA? Lin. Gmel. No. 75. Small rounded triangular, whitish 
tinged with rose colour at the umbones, which are tumid and marked 
with very elegant fine and oblique striae. Mediterranean. 
L. Guoputaris. Lam. 20. Sub-globose, thin, whitish, vesi- 
cular; no lateral teeth. %.— New Holland. ‘ 
L. Viretngea. Desh.—£. vol. 3. p. 379. Orbicular, depressed, 
white, with transverse ridgelike strize and very delicate longitudinal 
ones ; beaks very small and acute ; anterior depression heart-shaped, 
and rather exserted in the middle, posterivr simple and tinged with 
rose-color.— A mboyna.— Not unlike Radula, but larger and differ- 
ing by the hinge, the lunule, and the anterior slope. 
L. AurantiA. Lam. 34.—Ch. f. 396. Orbicular, convex, 
turgid and thick, whitish at the beaks, becoming orange as it recedes 
from them, finely striated transversely ; lunule depressed and ovate, 
posterior depression large and ovate: margins entire.—Indian 
Ocean. 
L. Puncrata. Sow. G.—Reeve. t.59. f.1.—VeENnus P. Lin. 
1134.—D. p. 194.—W.t.8.f. 81.—Cyruerea P. Lam. 54.— 
Ch. f. 397, 8.—E. t. 277. f. 3. Sub-orbicular, rather depressed, 
whitish often stained with pink on the slopes, with longitudinal 
distant grooves, and the intermediate spaces flattened : within with 
the margin rosy, and the central portion thickened, dotted, and 
usually yellowish : posterior depression minute and excavated. 
Diam. 2.—Indian Ocean. 
