96 TESTACEOUS MOLLUSCA. 
and approximate at their base, and one isolated and situated 
under the lunule ; three primary divergent teeth in the opposite 
valve, and a rather distant hollow parallel to the margin. 
* Inner margin quite entire. 
Section A.—Anterior tooth or iis receptacle striated. 
C. Lusorra. Lam.1.—Venush. D.p. 177.—Ch. f.340.— 
#. t. 270. f. 1.—W. t. 7. f. 43. Ovate, heart-shaped, smooth, 
white, with chesnut zones, which are interrupted in the middle : 
anterior tooth channelled and striated. 23.—China and Japan. 
C. Perecuiayis. Lam. 2.—. t. 268. f. 5, 6.—Sonw. G. 
— Reeve. t. 69. f. 1. and t. 70. f. 1. Sub-cordate, obovate, tu- 
mid, smooth, greyish, with dark tawny scattered dots under a 
fulvous epidermis: anterior side angulated and its slope slate- 
coloured : lunule obsolete : inside white with only a purple stain on 
the nymphe. 24 -—Indian Ocean. 
C.Imeupica. Lam. 3.—Ch. f. 347, 8. and 350.—Z£. t. 269. 
Jj. 1. Rounded, heart-shaped, smooth, thick, inflated, pale salmon- 
coloured, with the anterior slope (whose angle is very obtuse) and 
the obsolete rays and bands of pale livid violet : inside white with 
a purple stain at the anterior end. 24.—Indian Ocean! 
C. Castanea. Lam. 4.—Ch. f. 351.—E. t. 269. f. 2. Venus 
Meretrix. W.t.7. f-47. Heart-shaped, smooth, thick, ches- 
nut brown, the anterior slope bluish black : anterior side obtusely 
angulated. 2$—Zndian Seas. 
C.Mererrix. Lam. 6.—Del.t.8.f. 1. Triangular, smooth, 
white, but bluish olive on the slope of the angulated anterior side ; 
umbones spotted. 23.—India? 
C. Grapaica. Lam.7.—E. t. 266. f. 5. Rounded, triangular, 
smooth, grey, with brown rays or flexuous lineoles ; anterior slope 
oval and bluish ash-coloured : lunule oblong: sometimes rayless, 
sometimes with two imperfect rays : anterior slope slightly elevated 
in the middle. 13.—Jndian Seas. 
C. Morputna. Lam. 8.—Ch. f. 358.—L. t. 266. f. 3.* 
Rounded, triangular, smooth, grey, (sometimes with two imperfect 
brown rays), anterior slope bluish brown: lunule ovate. 1}3— 
Indian Ocean and N. Holland.— Perhaps a variety of the las t.2 
C. Zonarnia. Lam. 5—Arg. t. 21. F. Triangular, smooth, 
1 We have given a copy of the V. Exiuis of Chemnitz, f. 363. 
(D. p. 182.—W. t. 7. f. 53.) which may probably prove the young 
of this or MorPHINA. 
2 Quoted likewise for Venus Oprma by Lamare. I do not know 
the species. 
