WORMS. TESTACEA. 57. Solefi. 
Shell fubarched, fuboval, pellucid: on? hinge 2-toothed. 
Jtihahiss 4 >igkrca. Bnt.ZoJ. iv. ® 4 - „ 
UM thin', pellucid, about an inch broad, with a ^ [P 
tooth in one valve receiving a fingle one from the oppofite, 
'with a procefs in each fnell pointing towards the cartilage o{ 
the hinge. 
Shell lincgr-oval, ftraight : hinge? placed jn the middle anSi 
2 -toothed, one ot them bitid. 
Dono^jGn s Skelht ii* tah, 53 * 
Bevnent Brit. 7 .ool iv. tab.tfo. f. 24. 
Adanfon bitneg. tab. 19. /• 3. Blanc, / /• 5 t 
Lifter conch, tab. c^zo. fig. 
\inalt. Uii. tab. 91. f. A' Klein cdr. t. 1 1,/. 66. 
Born Uuj. Qaj. Find. tejU \ab. 2, /. ! , 2. 
Chemn. corcb. 6 . tab. fitg- 3 ^ 34 ' , . , , , 
Innabits /iKrc/M/r and fcas: inches broa . 
5W/fubpellucid, radi.te from the hinge to the ipargin, rounded 
ijt bgth ends, 
Shell fomewhat kidney-lhaped, with a fingle tooth in ont 
vaivv, and 2 in the other. 
Penn. Brit. 7 ooLiv. tab 0 ^ 6 , fiig.Z'i. 
Barbut'i Shells, tab. Z. Jig. g. Lifter, tab. JZ\, 
Lejfer teft.fi. 1 86. Gualt. teji. tab. 90, /. F. 
Kumpfi.' bUfi. tab. fiig E. 
Chemn. eonch. 6. tub. 5 . f. 3°» 37' . i l j 
Inhabits European and India ; above 2 inches broad. 
Shell fragile, covered with a rough cuticle, unaer which it is 
difty-w^itc widi tawny marks; both erids foanded. 
Shell oval, ftraight, fmooth, with a tranfvcrfe deprefTed ri^ 
growing on one f de. 
Barbuf, tab. 2./, 6. Lifter, fal.i, 22 ,f- JOO' 
Runipf. bluf. tab. 49, E. 
Gualt. 7 eft. tab. gi. f B, 
Argenville conch, tab. ZZ, f.P , , e ^ 
Knorr delic. tab. B. \\i.fi. 9. Vergn. 1. tab, 6. /. 5. 
Chem. conch. 6. tab. 5./. 38 — 40. -.v , .....f 
inhabits very thin and brittle: /r// vidct wuh 4 
verfe white rays growing larger.towards the thinner roargm. 
rarely 2 : the depreffed nb running nearly the length of the 
fhell : (.ftngf callous each fide, both the valves z-toothed. 
Shell oval, obliquely friate. 
Lifter, tab. 416. ft. z 6 o. Gualt. tell. tab. 91, V. 
Bonan.recr.z.f.-pj. Mufi. Kirch. z.J. -/b- 
Riimjfi. Mu/. rfl/),4;. N. Knorr. I ergn.b. t. S /-4* 
