94 TESTACEOUS MOLLUSCA. 
white within; hinge narrow, with the lateral teeth short, and two 
cardinal ones in each valve, with the rudiments of a third in the 
left. 1.—JIslands in the S. Seas. 
C. Vanixorensis. Quoy. Ast. t. 82. f. 4, 5. Roundish, de- 
pressed, rather solid, irregularly striated, with the umbones minute, 
and the cuticle brown; white within, hinge narrow, with three 
teeth, the lateral ones short, narrow, and far from .prominent.— 
Vanikoro. 
C. Ostonca. Quoy. Ast. t. 82. f. 6, 7, 8. Transversely ovate, 
with the posterior extremity sub-angulated, rather turgid, thin, ine- 
quilateral, finely striated, and the cuticle brown; within bluish 
white, and the palleal scar posteriorly sinuous; hinge narrow, with 
three teeth, and the anterior lateral one obsolete, the posterior pro- 
duced.—(Resembles a Venus in shape.) 
C. Sumatrensis. Sow. G.—Reeve. t. 63.  Roundish oval, 
gibbous, thick, with the beaks eroded, and the cuticle greenish 
brown : hinge with three cardinal teeth, two of which are larger, 
angulated, and sub-bifid, the lateral ones short and finely wrinkled. 
— Sumatra. 
C. Mexicana. Brod. and Sow. Z. J. 4. Elliptic, ventricose, 
white under an olivaceous cuticle, rounded at the ends, posteriorly 
shorter : inside whitish, varied with reddish violet, teeth small and 
obtuse. 1-3,.. 149;.—Mexico. 
C. Ausrratis. Desh. EH. 2. p. 50. Ovate-oblong, somewhat 
depressed, thin, fragile, greenish brown, and marked with extremely 
fine irregular concentric striz ; orange within. —New Holland.— 
Resembles a Cyclas.* 
GALATHEA. 
Liquivalve, sub-trigonal, covered with a greenish epidermis ; pri- 
mary teeth grooved, two in the right valve, joined at their base ; 
and three in the other, the intermediate one being separate and 
protruding ; lateral teeth distant; ligament eaternal, short, 
turgid, and prominent ; nymphe rather prominent. 
G. Rapiata. Lam.— Be. t. 73. f. 3.—Teviina HERMAPHRO- 
pita. D. p. 167.—Venus H. Gmel.—W. t. 8. f. 116.—V. 
Parapoxa. D.p. 180.— Born. t. 4. f. 12, 3.—List. t. 158. f. 

1 Quite distinct from the C. Cyprinoipes. Gray. Ann. Phil. 
25—W. S. 2. Venus. f. 14. Triangular, heart-shaped, gibbous, 
olive colour, concentrically grooved ; hinge thickened, the lateral 
teeth smooth ; the anterior one conic and approximated. 1}.. 14. 
2 See too the ©. Parva of Lesson.—C. Paranicensis and Va- 
rteGata of D’Orb. in Mag. de. Z. 1835. and C. Kecauprent of 
Lesson, in Voy. de Cog. t. 11.f. 3. Compare likewise the C. Si- 
SOLES. IV. SCH 2 SPs Bi 
