234 
Pefinata. 
Scripide 
Ladentula. 
Cin&a. 
WORMS. TESTACEA. 62. Venus. 
Brit. Zool. iv. p. 96. Gualt. test. tab. 75. figs 5+ 
Lifer conch. tab. 253. fig. 88. 
Liller an. Angl. tab. 4. fig. 23. 
Chemn. concb.. 7. tab. 39. fig. 412—414. 
Inhabits European Seas; 1 4 inch long and nearly 2 broad; co- 
vered with a chefnut cuticle, under which it is white, angu- 
lar, with unequal ftriz which are a little more remote than 
they are in V. exoleta: anterior flope with a long and narrow 
fent, pofterior depreflion heart-fhaped: Ainge with 1 tooth in 
one valve and 2 in the other. 
Shell fublentiform with longitudinal wrinkled grooves, 
branched near the anterior margin. 
Lister conch. tab. 342, 313. 
Rumpf. Muf. tab. 42. D. Pet. amb. tab. 18. fig. 14. 
Gualt, tefl. tab. 72. E, F. tab. 75. A. 
Argenv. conch. tab, 21. P. Knorr Vergn. 6. tab. 3. fig. 5. 
Chemn. conch. 7. tab. 39. fig. 415—419. 
Inhabits the Zzias and American Ocean; above 1 X inch long, 
and about 2 broad, more er Jefs convex, fometimes white with 
a brown pofterior ftope and a few fpots on the anterior part, 
fometimes entirely {potted with brown, fometimes marked 
with a. few black brown fpats on the anterior part: margin 
unequally crenate, 
Shell lentiform compreffed ftriate angular, the hinder angie 
ftraight. 
Rumpf. Muf. tab» 43. C. Argenv. conch. tab. 24. M. 
Pet. Amb, tab, 18. fig. 3. Gualt, teft. tab. 77. C. 
Knorr. Vergn. 5 tab. 15. fig. 3. 
Chemn. conch, 7. tab. 40. fig. 420--426. 
2. Born. Muf. Caf. Vind. teft. tad. 5. fig. 7. 
Chemn. conch. 7. tab. 39. fig. 410, 411. 
Inhabits the Zndian Ocean and Red Sea: very rare; 
Shel] truncate each fide, the hind-part more fo than the fore ; 
within white with a brown fpot; without varied: margin 
very entire: flopes marked with cheínut fpots, 
Shell fubglobular-lenticular, wrinkled, without teeth : 
pofterior flope ovate. 
Lister conch. tab, 260. Gualt. test, tab. 88. B. 
Chemn. conch. 7. tab. 40. fig. 427--429. 
Inhabits the American Ocean: diaphanous whitifh, when frefh a 
little reddith, within golden except the margin which is very 
entire: fenton the anterior flope narrow: beaks turned back. 
Shell very convex and furrounded with rings, the inter- 
mediate grooves crenate: pofterior {lope heart-fhaped : 
margin crenulate. 
Chemn. 
