248 WORMS. TESTACEA. 64. Chama. 
Meltkiana, Shell obtufely triangular equilateral plaited : anterior die 
elevated, with oblique plaits and ftria. 
Chenin. Link, 7. tab. 48. fig. 484—487. 
Inhabits——+refembles Ch. Cor, about the fize of an hazel nut: 
milk-white opake, the beaks a little diitant: hinge with a 
rounded narrow tooth under the beaks and an adjoining hollow 
for the infertion of the tooth in the oppofite valve; a little 
forwards is another long deep hollow between 2 teeth, and a 
little further back another round dilated tooth, 
Goncamera- Shell with tranfverfe wrinkles croffing the broad longitudis 
fa, hal ítriz: in the middle of each valve within is an 
additional chamber. 
Walch. Naturf. 12. p. $2. tabe t. fig. §—76 
Chemn, conch. 7. tab. 50. jig. 506. a—d. - 
Inhabits the American Oceaz: (mall whitifh; very rare. 
Li 
Racero- Shell rounded, with lamelle difpofed in rows: internal 
phylla. margin Crenulate. 
Seba. Muf. 3, tab. 88- figs 8. 
Knorr l'ergn. 1. 1. 21, f. 2, and 5, 1. 24. f. 16 
Chemin. conch. 7. tab. 52. fg. 514; $15. 
2. Seba Muf. 3. tab. 89. fig. 12? 
Inhabits the American Ocean; reíembles Ch. gtyphoides. 
Shell fometimes yellow or red, fometimes varied with white and 
red, within white or red or variegated: both the valves con 
vex, the lamellz increafing towards the margin, Probably a 
variety of C. Lazarus, 
Foliacea. Shell white with foliaceous ferrate traníverfe ftriz, the 
interítices crenate: beaks recurved. 
Lister conch, tab. 215 —-217. fig. 51—535.. 
Klein offr. tab. 12. fig. 81. 
Chemn. conch. 7. tab. $2. fig. $21. 
2. Lifter conch tab. 215. fig. 50. 
Inhabits the Mediterrancan and American Seas, and is found folliJe 
in Campania: fometimes round, fome times oblong, 
if 
Artilas Shell rounded, white undulate with brown, with triangular 
wrinkled perpendicular ribs : p d unequal. 
Bonan. retr. 2 Jig 86. Muf. Kirch. 2. fig. 84. 
Inhabits fhores of Syracu/e; probably a Chadian: 
Pulse Shell wrinkled oblong narrow brown: lower valve with a 
projecting rounded fubincurved Miis 
Inhabits -Gualt. test. tab. 101. fig. T 
