^G TESTACEOUS MOLLUSCA. 



delicate radiating striae, posteriorly much elongated, rounded yellow ; 

 anteriorly oblique, truncated, biangulated, pui-ple : the margin finely 

 denticulated. ^..4. 



D. PuLCHELLA. Nobisin Z. P. 1843. Very elongated trans- 

 versely, convex, very inequilateral, pellucid, polished, whitish, with 

 three anterior narrow purple rays, obsoletely and radiatiugly striated ; 

 anterior slope rounded, finely striated longitudinally, its edge very 

 convex ; ventral edge crenulated, nearly straight, sub-incurved an- 

 teriorly ; lateral teeth very approximate. -^•'\. — W. Indies? — 

 Very like ScalpeUum. Gray.^ 



CAPSA. 



Transverse, equivalve, valves approximate and close ; with two 

 primary teeth in the right valve, and a single bijid one in 

 the left ; no lateral teeth ; ligament external. 



C. COMPLANATA.* SoW. G.f. 8. — TeLLINA PoLlTA. Poli.2. 



t.2\.f. 145.— DoNAx CoMPLANATA. Mont. p. \06.—Turt. B. 

 t. 7./. 13, A.—D.ji. 150.— TF. t. 6./. 6. Ovate-oblong, trans- 

 verse, smooth, whitish under a greenish epidermis, and marked at 

 the posterior end with a single yellowish ray, bordered by two 

 brown lines : margin quite entire, somewhat violet within. — Medi- 

 terranean, ij'C. 



C. Levigata. Lam,. 1, — Donax. L. Gmel. 3265. — D. p. 

 154.— CA./. 249.— W. t. 6.f. 14. Triangular, ovate, sub- 

 equilateral, obsoletely striated, and slightly depressed on the anterior 

 slope ; epidermis greenish yellow, beaks and interior violet : mar- 

 gin quite entire. 1 g . . 2^. — Tranquehar. 



C. Brasiliensis. Lam. 2. — Sow. G.f. 1. — Reeve, t. 61. f. 1. 

 — Bl. t. 7\.f. 3.—E. t. 261./. 10. Oblong, triangidar, inequi- 

 lateral and very depressed towards the anterior extremity ; epider- 

 mis yellowish green, striated both longitudinally and transversely : 

 whitish within. — Brazil. — Larger than the last. 



C. RiNGENS. Desk. — Donax Serra. D. p. 149. — W. t. 

 6.f. 4.— Donax R. Lam. ]6.— Ch.f. 251, 2.—E. t. 260./. 3. 

 Large, ovate-triangular, wedge-shaped, with the anterior end gib- 

 bous, rough, and undulatingly wrinkled ; whitish, stained with 

 violet within : margin strongly toothed, cartilage cleft oblong. 2.. 3. 

 — Cape of Good Hope. 



C. Altior. Sow. Z. P. 1832. Sub-triangularly oblong, palish 



1 A copy of Schroeter's figure of Donax Candida (TF. t. 6. / 20.) 

 is given, but the description of the hinge which is stated to have 

 three cardinal and a lateral tooth in each valve, prevents the pos- 

 sibility of its belonging to this genus. 



