TRIBE CONCHACEA. 99 



times form two indistinct rays : white wdthin. 1 .^ . . 2. — S. Ame- 

 rica, W. Indies. 



C. CiTRiNA. Lam. 24.— Desk. E. vol. 2.f. 56.— Del. t. 8./. 

 8. — Chione Striata. Gray in Analyi^f, 1838. Triangularly 

 heart-shaped, transversely striated, citron colour spotted ventrally 

 on the anterior side both within and without with reddish brown ; 

 the anterior slope reddish and somewhat rayed ; Innule sub-cordate, 

 inside purplish brown. If. — New Holland. 



C. Albina. Lam. 25. — Del. t. 8.f. 5. Somewhat heart-shaped, 

 ovate, white, with the umbones pale, marked with a few trans- 

 verse striae ; scarcely any lunule ; perfectly white within. If. — 

 Indian Ocean 1 — SUyhtly resembling List. t. 2G3. f. 99. 



C. L^TA. Lam. 26.— Venus L, Lin. 1 132.-^ TF. t. 7.f. 49. 

 —D. 2). 180.— Ch.f. 353, 4.—L:. t. 266. /. A.—Bl. t. 74. f. 1. 

 — V. Affinis. Gmel. 3278. Somewhat heart-shaped, obovate, 

 tumid, not thick, whitish with rather interrupted tawny rays; 

 lunule subovate and raised towards its point, where it forms an 

 angle; inner disc often fleshy pink. 2.— Molhiccas. — Variety. 

 Without rays, but with minute red spots at the umbones. 



C. Mactroides. Lam. 27. — Del. t. 8./. 2. Triangular, sub- 

 equilateral, depressed, ferruginous, with a few white rays, and trans- 

 verse striae towards the ventral margin ; the antei'ior slope rufous 

 or rust-coloured and flattened ; lunule lanceolate, beaks whitish : 

 white within. 2. 



C. Trigonella. Lam. 28. — Del. t. 8. /. 3.— Trigonella 

 Angulifera. Gray in Analyst, 1838. Small, triangularly- 

 ovate, smooth, mottled with pale fulvous and purple, and marked 

 with rufous angularly flexuous lines ; spotted within. — W. Indies. 



C. SuLCATiNA. Lam. 29.— Ch.f. 371, 2.—E. t. 269./. 3. 

 Rounded triangular, brownish red rayed with white, with transverse 

 striae, which almost become grooves postei'iorly ; lunule heart- 

 shaped : golden yellow within. 1^. —India.— Variety. Pale 

 brown at the anterior end : white within. 



C. Hebr^a. Latn. 30. — Del. t. 8. f. 6. Obliquely heart- 

 shaped, ventricose, transversely striated, white, somewhat rayed 

 with linked fulvous letter-like markings, and stained with reddish 

 brown under each beak in the interior, which elsewhere is white. 

 1^. — Indicm Ocean? 



C. Castrensis. Lam. 31. — Reeve, t. 1\. f- 2- — Venus C. 

 Lin. 1132.— D. p. 183.— Ch. f. 367, 8. — TF. t. ?. f. 57— 

 Knorr. 1. t. 21. /. 5. ^ 2. t. 20. f. 2. 8f 6. t. 6./. 5, 6.'— List. t. 

 262. f. 98. Roundish, heart-shaped, broader than long, ventricose, 

 thick, glabrous, white, with scattered purplish brown chesnut or 

 yellowish short broad angulated streaks, one of whose edges is 

 broken : lunule elongated, heart-shaped, and defined by a groove. 

 Variety. Ch. f. 1662. With short brown forked markings, tlie 

 angle being directed towards the beak. 24. — Indian Ocean. 



H 2 



