30 TESTACEOUS MOLLUSCA. 
purplish : within, with three purple spots on the dorsal edge. 17.— 
China ? . 
M. Niripa. Schroeter, vol. 3. t. 8. f. 2.—D. p. 136.—W. t. 6. 
Ff. 13.—M. Srraminea. Lam. §.  Triangularly ovate, smooth, 
shining, diaphanous, white scarcely if at all rayed ; beaks obsoletely 
rufous: ligament external, in an oblique triangular groove. 13.— 
Cape of Good Fope. 
M. Guasrata. Lin. 1125.—D. p. 136.—W. t. 6. f. 12.—M. 
Austratis Lam. 10.—Ch. f. 216, 7. Triangular, thickish, 
diaphanous, glabrous, finely striated transversely, tawny white : 
umbones very smooth ; interior with two or three purple stains. 
21..3.—New Holland. 
M. Viouacea. Gmel. no. 18.—D. p. 135.—Lam. 11.—Ch. f. 
213, 4.—H. t. 254. f. 1.—- W. t. 6.6 9. Triangularly ovate, sub- 
equilateral, thin, diaphanous, nearly smooth, violet within and 
without, but darker at the beaks and paler on the depressions of 
which the anterior is lanceolate, the posterior oblong, anterior lateral 
tooth short and approximate. 2}..3.— T'ranquebar. 
M. Fascrata. Lam.12. Gualt.71. B. (tolerable) Triangular, 
ventricose, thin, smooth, subdiaphanous, white with distant violet 
zones ; anterior slope striated and very pale ; violet within ; variety ; 
with pale fulvous rays.— Atlantic ? 
M. Turerwa. Gmel. 3260.—D. p. 134.—Lam. 13.—Ch. f. 
210, 212.—- EF. t. 255. f. 3.—W. t. 6. f. 8. Triangularly ovate, ven- 
tricose, thin, smooth, pellucid, pale ochraceous, finely striated, 
transversely and wrinkled at both ends; umbones incurved and 
pale reddish purple; within, white with a large purple stain under 
the hinge. 2..24.—Tvranquebar. 
M. Purcatarta. Lin. 1125.—D. p. 132.—Lam. 14.—Ch. f. 
202, 3,4.—M. Suppricata. W. S. f. 6. Oblong, thin, dia- 
phanous, pale dull brownish-white, strongly plaited transversely 
both inside and out ; hinge much nearer the anterior than the 
posterior extremity, both depressions flattened, the oblong posterior 
the most so. 13..23.—Indian Ocean. 
M. Rurescens. Lam. 15. Triangularly ovate, sub-equilateral, 
solid, rather tumid, reddish fulvous, slopes striated, smooth near the 
beaks which are approximate, but with coarse plait-like stricz to- 
wards the ventral margin, which is much areuated but anteriorly 
incurved slightly ; inside opaque white, the teeth strong, the V- 
shaped one large, the lateral smooth, moderately distant, sub-equal: 
1}..2.— New Holland. 
M. Macunatra. Gm. 3260.—D. p. 134.—Lam. 16.—Ch. f. 
208, 9.— E. t. 254. f. 3.—W. t. 6. f. 7. Obtusely triangular, 
slightly angulated at the anterior and rounded at the posterior 
depressed extremity, inflated, thin, white, with scattered reddish 
chesnut spots. 12..24.—Nicobar Isles. 
