100 TESTACEOUS MOLLUSCA. 



C. Ornata. Lam. 32.— Ch. f 369, 370.— E. t. 273. /. 5. 

 Roundish triangular, not ventricose, bluish white, with longitudinally 

 disposed crowded chesnut angular streaks : anterior slope yellowish; 

 lunule somewhat heart-shaped and defined by a groove. 1 t 9 q. — In- 

 dian Ocean. — Probably a variety of Castrensis. 1 



C. Picta. Lam. 33.— Venus Ornata. D. p. 184.— Ch. f. 

 380, ].—W. t. 7.f. 59. -E. t 272. f. 2, 3.— List. t. 259./. 95. 

 Obtusely heart-shaped, obovate, and moderately convex, smooth, 

 covered with angular linear rufous or chesnut markings, (forming a 

 rude net-work) on a white ground : umbones tumid ; lunule ovate : 

 inside yellowish. 1. — Indian Seas. 



C. Tigrina. Lam. 34.-— An. Ch. f. 374, 5.— Vol. Amb. t. 

 15. f. 16. Ovate, smooth in the middle, and grooved at the sides, 

 white, with small unequal scattered, dark brown triangular spots ; 

 lunule small, heart-shaped, and brown. If. — Amboyna. 



C. Venetiana. Lam. 35. — Phil. p. 40. t. 4. f. 8.— Venus 

 Rudis. Poll. 1. t. 20. /. 15, 6.— Del. t. 9. /. 9. Obliquely 

 heart-shaped, ventricose, transversely striated, white with yellow 

 and rufous rays, composed partly of broken angular spots ; depres- 

 sions brownish red : inside whitish. -J. — Lagunes of Chioggia, 

 near Venice. 



C. Juvenilis. Lam. 36. — Venus J. Gmel. 3287. — D. p. 

 196. — Ch.f. 405.— E. t. 280./. 2. — TV. t. 8./. 85. Orbicular, 

 convex, white with brown spots forming indistinct rays, and rounded 

 concentric striae, which become coarser and ridge-like at each ex- 

 tremity ; lunule small heart-shaped and sunken. — Variety. (Rufa. 

 Lam. 37.) Reddish fulvous, with two darker rays. 1-^. — India. 



C. Guineensis.* Lam. 38. — Turt. B. p. 161. — Venus. G. 

 Gmel. 3270.— Venus Circinata. D. p. 169.— Ch. f. 311. 

 — Born. t. 4./. 8. — W. t. 7-f 24. Obliquely heart-shaped, with 

 raised ridge-like concentric striae ; both depressions dark purple and 

 unarmed, reddish or purplish, with white rays. Variety. Whit- 

 ish with reddish rays. (E. 265./. I.)— Variety. Uniform white. — 

 IV. Africa. — Shape of next. 2 



C. Dione. Lam. 39. — Reeve. t.7\-f. 1. — Venus D. Lin. 



\\25.-D.p. 158.— Ch.f. 271, 2, 3.— W. t. 7.f \.—E. t. 275. 



/. I. Obliquely heart-shaped, transversely ribbed, with a double 



row of spines on the anterior slope, reddish purple. 1^. . 1^. — 



1 So likewise is Lorenziana of Chemnitz, (/ 1961, 2. — I), p. 

 \$4.— W. t. 7.f 59.) according to Mr. Gray. 



2 We have copied Schroeter's figure of Gmelin's Venus Caliste, 

 JV. t. 7-f 27- — D. p. 170.) which is described as resembling this 

 species. It is probably then a Cytherea, but 1 have not recognized 

 the shell. 



