VENUS. CONCHIFERA. 97 



V. verrucosa, Lin. Shell somewhat heart-shaped, with striated mem- 

 branaceous ribs, becoming strongly warted at both ends ; margin 

 crenulated within. 1| to 2 inches long. Inhabits European 

 coasts. B.-~Penn. Brit. Zool. pi. 57, fig. 1. 



V. casina, Lin. Shell somewhat-heart shaped, with acute concentric 

 transverse ribs, and grooved behind the beaks ; margin crenulated 

 at the posterior end. 2 inches in diameter. Inhabits European 

 coasts. B. Penn. Brit. Zool. iv. pi. 57, fig. 2. 



V. plicata, Gmel. Shell subcordate, angulated anteriorly, with 

 numerous transverse membranaceous ribs; cordiform depression 

 nearly smooth ; purplish or pale flesh colour, white about the um- 

 bones. 2 or 3 inches long. Inhabits Indian seas. D'Argenv. 

 pi. 21, fig. K. 



** No lamellar strice. 



V. granulata, Gmel. Shell somewhat heart-shaped, slightly gibbous ; 

 with elevated decussated striae ; margin crenulated ; colour white, 

 with brownish lines or spots ; inside tinged with purple ; poste- 

 rior depression cordiform,, brown. 1 inch long. Inhabits Ame- 

 rican and European seas. B Donov. iii. pi. 83. 



V. mercenaria, Gmel. Shell cordiform, ponderous, slightly striated 

 transversely ; posterior depression heart-shaped; inner margin cre- 

 nated ; colour grayish white ; inside bordered with dark violet. 

 2| inches long. American seas. Chem. x. pi. 1 71, fig. 1659, 1660. 



V. gallina, Gmel. Shell somewhat heart-shaped, trigonal, with 

 crowded transverse rounded ridges ; colour yellowish brown, with 

 two or three pale rays and numerous zigzag streaks. 1 inch in 

 diameter. European seas. B. Brown's Ulust. pi. 20. fig. 11. 



*** Internal margins entire. 



V. Malabarica, Lam. Shell oblong-ovate, obscurely radiated, cine- 

 reous ; densely striated transversely ; anterior impression broad 

 and ovate, and the posterior cordiform. 1^ inch long. Inhabits 

 Indian seas. Chem. vi. pi. 31, fig. 324, 325. 



V. lilerala, Gmel. Shell oval, compressed, angulated on the an- 

 terior side, and striated transversely ; colour white, variously 

 marked with dark brownish zigzag lines, or larger and smaller 

 blackish lines or spots. 2 inches long. Inhabits Indian seas. 

 D'Argenv. pi. 21, fig. A. 



V. decussata, Gmel. Shell oblong-ovate, angulated on the anterior 

 side, with crowded decussated striae ; margin entire ; colour gray- 

 ish or rusty brown, with purplish brown spots or irregular zigzag 

 stripes. 1^ or 2 inches long. Inhabits European coasts. B. 

 Brown's Ulust. pi. 19, fig. 5, 6. 



V. pullastra, Maton and Rack. Shell transversely oblong, with 

 fine concentric striae, becoming rough at the posterior extremity, 

 minutely striated longitudinally ; syphon mark broad, parallel 

 with the marginal impression ; colour white, variously marked 

 with brownish, purple, or black. 1J inch long, and 2 broad. 

 Inhabits European coasts. B Brown's Ulust. pi. 19, fig. 7- 

 VOL. II. G 



