100 TESTACEOUS MOLLUSCA. 
C. Ornata. Lam. 32.—Ch. f. 369, 370.—H. t. 273. f. 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 =°,.—dn- 
dian Ocean.—Probably a variety of Castrensis. 
C. Picta. Lam. 33.—Venus Ornata. D.p. 184.—Ch. f. 
380, 1.—W.t. 7. f. 59.—E. t. 272. f. 2, 3.— List. t. 259. f. 95. 
Obtusely heart-shaped, cbovate, 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.—Jndian Seas. 
C. Trierina. Lam. 34.—An. Ch. f. 374, 5.—Val. 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. 12.—Amboyna. 
C. VengeTiAna, Lam. 35.—Phil. p. 40. t. 4. f. 8.—Venus 
Rupis. Poli. 1. t. 20. f. 15, 6.—Del. t. 9. f. 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. 4.—Lagunes of Chioggia, 
near Venice. 
C. Juvenitis. Lam. 36.—Venus J. Gimel. 3287.—D. p. 
196.—Ch. f. 405.—E. t. 280. f. 2.—W. t. 8. f. 85. Orbicular, 
convex, white with brown spots forming indistinct rays, and rounded 
concentric striz, which become coarser and ridge-like at each ex- 
tremity ; lunule small heart-shaped and sunken.— Variety. (Rura. 
Lam. 37.) Reddish fulvous, with two darker rays. 11.—India. 
C. Guineensis.* Lam. 38.—Turt. B. p. 161.—Venvus. G. 
Gimel. 3270.—Venus Circtnata. D. p. 169.—Ch. f. 311. 
— Born. t. 4. f.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. (2. 265. f. 1.)— Variety. Uniform white.— 
W. Africa.—Shape of next.2 
C. Dione. Lam. 39.—Reeve. t.71. f. 1.—Venus D. Lin. 
1125 = D./p9.158.—Oh f..27h 25 322 Wats Jap a es 
Jf. 1. Obliquely heart-shaped, transversely ribbed, with a double 
row of spines on the anterior slope, reddish purple. 14..13.— 

1 So likewise is Lorenzrana of Chemnitz, (f. 1961, 2.—D. p. 
184.—W. t. 7. f. 59.) according to Mr. Gray. 
2 We have copied Schreeter’s figure of Gmelin’s Venus Cauiste, 
W. t. 7. f. 27.-—D. p. 170.) which is described as resembling this 
species. It is probably then a Cytherea, but I have not recognized 
the shell. 
