56 TESTACEOUS MOLLUSCA. 



ventricose, and beaks somewhat prominent ; partially rayed, and 

 spotted with red and white, and slightly striated concentrically : 

 nymphse prominent. 2\,. 2. — Tranquebar, Ceylon, and the 

 Nice-bar Isles. 



S. Rosea. Lam. 2. — Sorv. G. f. 1. — Reeve, t. 52. f 1. — 

 Solen Sanguinolentus. Gmel. 3227. — D. p. 67. — Ch.f. 56. 

 — E. t. 227. f \.— W. t. 3. f. 28. Sub-oval, rather convex, 

 slightly produced and angulated at the anterior extremity, and 

 rounded at the other ; rose colour, becoming paler towards the 

 margin, and nearly smooth. 1-J..2 — West Indies. 1 



S. Nuttalii. Conr. Journ. A.N.S. Phil. 230. t. 17. /. 6. 

 Sub-ovate, thin, much compressed ; anterior margin obliquely 

 truncated, extremity angular; ventral margin regularly arcuated, 

 beaks small, slightly prominent, distant from the posterior 

 margin ; ligament short and very prominent, nymphse very pro- 

 minent ; whitish, with purple zones and rays, epidermis polished, 

 and horn coloured, with paler spots and rays : teeth prominent, 

 slender and fragile. 1-J-. . If. — U. California. 



S. Californiana. Conr. Journ. A. N. S. Phil. 7. p. 231. 

 t. \7.f7. Ovate, compressed, sub- equilateral, thin : fragile, dull, 

 rosaceous, the anterior side much compressed, cuneiform. ft ••!-§*• 

 — U. California. 



S. Biradiata.— Solen. B. Wood, G. C. p. 135. tab. 33. f. 1 . 

 — X>. J?. 67. — W. I. 3. f. 26. Oval, sub-equilateral, rounded and 

 gaping at both ends, livid purple, with two oblique white anterior 

 rays ; epidermis green : inside whitish, becoming pale orange by 

 age, hinge with two teeth in each valve. 



PSAMMOBIA. 



Transverse, elliptical, or oblong-ovate, flattened, slightly gaping at 

 one side ; beaks prominent ; two primary teeth in the left valve, 

 and one in the opposite one. 



P. Rugosa. Desh. — Sanguinolaria R. Lam. 4. — Venus 

 Deflorata. Lin. 1133.—TF. t. 8. /. 64.— D. p. \86.—Mo?it. 

 t. 3.f. 4. — V. Versicolor. Gmel. 3281. — V. Purpurea. Gm. 

 3289.— .#. t. 231. /. 3. — Ch.f 79 to 83.— PsammobiaR. Sow. 

 G. f 1. — Reeve, t. 53. /. 1. Ovate-oblong, ventricose, with 

 strong longitudinal and fine transverse wrinkles, both becoming 

 coarser at the anterior end which is generally more or less stained 

 with purple : white, pale reddish, yellowish, or purple, and some- 

 times rayed with the latter colour. 1^.-2 — India and America. 



1 S. Livida, Lam. 3. and Rugosa, Lam. 4. (having but a 

 single tooth in one of the valves) belong to Psammobia. 



