WORMS. TESTACEA. 42. Venus/ 15T 



lete towards the extremities : beak central, with a heart-shaped 

 depression beneath it. 



2dT. V. vtrrucosa. Suborbicular, convex, with strong rai- 

 sed ridges forming membranous protuberances to,- 

 wards the outer margin which is crenulare. 



Jbonov. t. 44. /?r. Zool. I. 54. /. 48. Da Cost. t. i-z.f. i. 



Shell about 2 inches long and as much broad, dirty-white with 

 often a rufous tinge, within white, fmooth", crenulate at the 

 margin, rugged with wrinkled knohs at the sides, in the young 

 shell fometimes faintly striate longitudinally, Donov. t. 115 : beak 

 central) curved, beneath which is a heart-shaped depression. 



258. V. Gallina. Somewhat heart-shaped, with obtuse 

 recurved concentric striae and 3 or 4 rufous-browa 

 stripes from the beak : hind-tooth minute. 



2?r. Zool. t. 56. /. 50. Donov. t. 68. Linn. Tr. vi. t. 17. /. 7. 8. 



Shell about an inch long, one and a quarter broad, foraetimes 

 whitish brown and plain, often with rufous fpots, but moft com- 

 monly with 3 or 4 broad stripes which are ufually marked with 

 eigzag darker lines, within white with a crenulate margin : beak 

 curved, with a heartshaped depression under it 



259. V. islandica. Suborbicular, convex, strong, irregu- 

 larly striate, covered with a brown skin, within pure 

 white : beak without the depression under it. 



Donov. t. 77. Br. Zool. t. 53./. 47. Da Costa t. i$.f. 5. 



Shell 3 inches 3 quarters long, 4 and a quarter broad, whitish co- 

 vered with a glossy yellow-brown skin, within white with a plain 

 margin : beak curved to one side : teeth 3, the middle-one double, 

 the lateral-one linear oblique, crenulate. 



260. V. Chione. Somewhat hearted, strong, faintly wrin- 

 kled, covered with a smooth glossy chesnut skin, with 

 faint darker rays. 



Donovan t. 17. Da Costa t. \$.f. 7. 



Shell 3 inches long, near 4 broad, within glossy-white, with a 

 plain margin : beak oblique, turned sideways, with a heart-shaped 

 depression beneath it: teeth 4, the 2 middle-ones approximate and 

 lanceolate, the a lateral-ones divaricate. 



261. V, exoleta. Orbicular, strong, with regular close- 

 set striae, generally pale with obsolete broad rays. 



Br. Zool. t. 54. f. 49. t. 66. f. 49. Donovan t. 42./1 i. 



Shell 2 inches wide, fometimes white and plain, oftener with 

 broad or narrower pale rays, within fmooth white with a plain 

 margin : beak curved, with a short heait-shaped depression 

 under it. 



262. V. undata. Orbicular, thin, convex, with fine irre- 

 gular striae ; the margin undulate. 



Br. Zool, t. 55. /. 51. Donov. t. 121. Linn. Tr. vi. t. 17. /. 17. 18. 



Shell an inch and quarter broad, a little more in length, white 

 with a yellowish tinge, within glossy with a plain margin: beak 

 a little carved, without depression under it. 



263. V. Casino. Suborbicular, with transverse acute re- 

 curved ridges, crenulate on the hind-margin, slightly 

 channelled behind the depression. 



Linn. Trans, viii. t. a./, i. Br. Zool. t. 54. /. 48. A. 



Shell an inch and a half wide, refembling V. verrucofa, but the 

 ridges are more acute, and do not form protuberant knobs at the 

 outer margin, white with angular brownish lines : plaits broader 

 or narrower^ nearly uniting : hinge thick. 



264. V.lactea. Orbicular, thick, flattish, with regular 







