134 TESTACEOUS MOLLUSCA. 



anteriorly, and oblique transverse strife posteriorly, pale yellowish 

 white with scattered red spots, and six or seven oblique stripes of 

 the same colour on the smooth anterior slope : within white 

 tinged with yellow towards the beaks. 2 . . If. — Indian Ocean. 



C. Pectinatum. Lam. 29. — Murray. Fund. Test. t. 3. 

 f. 18. Somewhat heart-shaped, transverse, whitish with twenty- 

 five transversely and rather distantly grooved ribs, umbones yel- 

 lowish. 1^. — Mediterranean. — " Less inequilateral than the two 

 succeeding." — Lam. " Probably a variety of Edule. 1 ' — Desh. 



C. Rusticum. Lam. 30.— Lin. 1124.— D. p. 128.— Ch. 

 f. 193. Transversely ovate, antiquated, with from twenty to 

 twenty-two distant ribs and the interstices wrinkled and broader 

 than in Edule ; whitish with the umbones reddish brown, some- 

 times marked with yellowish bluish or brown bands : brown 

 within. Adriatic. — Probably a variety of Edule. 1 



C. Edule.* Lin. 1124.— D. p. 127.— Lam. 31.— W. t. 5. 

 f. 26.— Ch. f 194.— Pen. 4. t. 51. /. 40.— Wood. G. C. t. 55. 

 f. 4. Rounded heart-shaped, becoming obliquely heart-shaped 

 from the anterior side being produced by age, with about twenty-six 

 ribs, which are crossed by transverse wrinkled somewhat imbricated 

 striae, whitish or pale rust colour with the interior white and 

 anteriorly stained with brown. — Europe.* 



C. Groenlandicum.* Lam. 32.— Gmel. 3232.— L>. p. 129. 

 — E. t. 300. f. 7.— (Young. Ch.f. 198.)— Gould. Mas.p. 92.— 

 W. t. 5. f. 28.— Mactra Radiata. Don. 5. t. 161. —W. t. 6. 

 /. 17.— Turt. Biv.p. 75.— D. p. 138.— C. Edentulum. Mont. 

 — Sow. G. f. 2. — Aphrodite Columba. Lea. Am. Trans. 5. 

 t. 18. f. 54. Large, not thick, subtriangular, elevated, rather 

 compressed, subequilateral, posteriorly rounded, anteriorly slightly 

 gaping, drab coloured with very numerous obsolete radiating 

 ridges : beaks slightly prominent, incurved ; within salmon- 

 coloured at the margin, the disc opaline : usually no cardinal teeth, 

 the lateral small but distinct. 2^ . . 2f . — Young, often with rusty 

 brown stripes or angular markings. — Atlantic. 



C. Latum. Gmel. 3255.— D. p. 125.— E. t. 296. f. 7.— Ch. 

 f. 192, 3.— Wood. G. C. t. 57. f. 4, 5.—W. t. 5.f. 42. Trian- 

 gularly ovate, very inequilateral; whitish with yellow spots and 

 irregular bands, and the beaks tinged with violet, with about forty 

 flattened ribs, which are separated by very narrow and shallow grooves, 

 and have a row of minute elevated points : within white, brownish 

 near the beaks. 1^ . . 2. — Tranquebar and Nicobar Isles. 



1 C. Fasciatum. of Montagu. Sup. t. 27. f. 6. p. 30.— Turt. 

 Biv. p. IS9.— W. t.5.f. 13. is the young (fide Sowerby in C. I.) 

 of this species. 



2 C. Crenulatum. Lam. 54. is a Variety. 



