86 TESTACEOUS MOLLUSCA. 



delicate radiating striae, posteriorly much elongated, rounded yellow ; 

 anteriorly oblique, truncated, biangulated, purple : the margin finely 

 denticulated, ^..f. 



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

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

 three anterior narrow purple rays, obsoletely and radiatingly striated ; 

 anterior slope rounded, finely striated longitudinally, its edge very 

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

 teriorly ; lateral teeth very approximate, ^..f. — W. Indies?-^ 

 Very like Scalpellum. Gray. 1 



CAPSA. 



Transverse, equivalve, valves approximate and close ; with tw& 

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

 the left ; no lateral teeth ; ligament external. 



C. Complanata.* Sow. G.f. 8. — Tellina Polita. Poll. 2. 

 t.2\.f. 145. — Donax Complanata. Mont. p. 106. — Turt. B. 

 t. l.f. 13, 4.— D. p. 150.— W. t. 6.f. 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, fyc. 



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

 \54.— Ch.f. 249.— W. t. 6. /. 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 \ . . 2\. — Tranquebar. 



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

 — Bl. t. 71. f. 3.—E. t. 261. f. 10. Oblong, triangular, 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. Desh. — Donax Serra. L). p. 149. — W. t. 

 fi.f. 4.— Donax R. Lam. U.— 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 Schrceter's figure of Donax Candida (W> 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. 



