Chama. 
MOLLUSCA. CHAMADJE. 
419 
CHAMADiE. 
Gen. chama.— B eaks large, incurved, unequal ; ligament 
external ; hinge with one thick, oblique, subcrenated tooth 
in one valve entering a pit in the opposite. 
1. C. haleotoidea. — Flattish, oval, uneven, with one longitudinal curved 
line outside, and a deep curved hollow within the deepest valve, extending 
from the beak around one side ; the remainder very shallow, margin thin, 
broad, slightly fringed, crenate within ; muscular impression large. — Sower. 
Min. Conch, t. xxv. — Green Sand. 
2. C. Oblong-oval, flattish, plaited ; deeper valve with a la- 
teral canaliculated projection. — Sower. Min. Conch, t. xxvi. f. 1. — Green 
Sand. 
3. C. recurvata — Deep valve conical, curved ; beak ''subinvolute.— 
Min. Conch, t. xxvi. f. 2. — Green Sand. 
4. C. cornea. — Oblong, curved ; larger valve deep, with a blunt conical 
beak, and a small wing ; lesser valve oval, flat, with a crenated margin and 
wing. — Sower. Min. Conch, t. xxvi. f. 3 — In Green Sand. 
5. C. plicata — Transversely ovate ; beak short ; deeper valve Avith a nar- 
row channelled wing. — Sower.. Min. Conch, t. xxvi. f. 4. — Green Sand. 
6. C. digitata — Palmate, slightly recurved, gibbose, with 5 or 6 marginal 
elongated canaliculated processes; surface smooth — Sower. Min. Conch, 
t. clxxiv. — Green Sand and Middle Oolite. 
7 . C. squamosa — Attached by the right valve ; nearly orbicular, subglo- 
bose, imbricated ; lamellae undivided, somewhat erect, anteriorly produced, 
and adpressed ; posterior part of the right valve obsoletely costated ; left 
valve rather convex ; smooth within.— (Smwcfer, 86, 87*) Sower. Min. Conch, 
t. cccxlviii, — London Clay. 
CARDIAD^. 
Gen. CIX. ISOCARDIA. — Beaks distant, involuted, and 
inclining forwards ; hinge with two flat oblique teeth at 
the beak, and a remote lateral one under the ligament. 
430. I. Cor . — Shell tumid, smooth, brown, with the bea,ks 
clouded white. 
Bucardia, List. Conch, t. cclxxv. — Chama cor, Linn. Syst. i. 1137* 
Mont. Test. Brit. 134. Laskey, Wern. Mem. i. 385. t. viii. f. 7* — I* 
cor. Turt. Biv. Brit. 193. t. xiv — Found in deep water on different 
parts of the coast, burrowing in the mud. 
Length approaching 4 inches, and nearly as broad. Mr Bulwer has point- 
ed out some differences between the individuals found on the east coast of Ire- 
D d S 
