92 TESTACEOUS MOLLUSCA. 
CYRENA. 
Shell roundish and trigonal; turgid or ventricose, inequilateral, 
solid, with a strong epidermis, and the beaks usually decorticated ; 
hinge with three teeth in each valve ; lateral teeth almost always 
tivo, one of which is near the primary ones ; ligament external, 
and placed on the larger side. 
* Lateral teeth serrated or denticulated. 
C. Trigoneitua. Lam. 1. Smallish, triangular, sub-equilateral, 
fulvous and nearly smooth, beaks somewhat violet. 3.—. Indies. 
C. Ortentatis. Lam, 2.—Del. t. 7. f. 8. Transverse, sub- 
triangularly ovate, olive green, the beaks violet, with transverse dis- 
tant grooves : violet within, the lateral teeth serrulated. 3.— China. 
C. Cor. Lam. 3.—Del. t. 7. f. 7.—TELLINA FLUMINALIS. 
Muller.—D. p. 106.—Ch. f. 320.—E. t. 302. f. 2.—Venus F. 
W.t. 8. f. 113. Elongated heart-shaped, oblique, fully as long as 
broad, anteriorly longer and rather attenuated, thick, tumid, cuticle 
olive green with often olive brown zones, with distant sub-imbricated 
grooves: beaks prominent and involute: inside violet. 15.— 
Luphrates. 
C. Fuscata. Lam. 4.—Tevuina Fuuviatizis. D. p. 107.— 
Ch. f. 321.—E. t. 302. f.2.—Venus F. W.t.8.f.115. Trans- 
verse, olive green, sub-equilateral, rounded at the sides, not thick, 
with close sub-imbricated grooves ; beaks obtuse: violet within. 
1.— Canton. 
C.Fiuminea. Lam. 5.—Teviina Fuuminea. Gimel. 3243. 
—D. p. 107.—Ch. f. 322, 3.--Schre. Fluss. t. 4. f. 2.—Venus 
F. W.¢. 8. f. 114. Heart-shaped, gibbous, yellowish-green, girt 
with transverse broad grooves; within mottled with white and 
violet, hinge with the lateral teeth finely denticulated. 1.—China. 
C. Viotacea. Lam. 7.— Del. t. 7. f..3.—H. t. 301. 7. 1. 
Ovate elliptic, inequilateral, transversely grooved, violet within and 
without, indistinctly rayed; anterior side convex and acute, the 
beaks decorticated ; hinge with the lateral teeth denticulated. 13. 
—The figures represent a much larger specimen.—Indian Ocean. 
C. Limosa. Gray. Ann. Phil. 25.—Teviina L. Maton. 
Lin. TWt- 24. 7:8, 9210. W 00d. (GC. 46.445 
p. 106.—W. t. 5. f. 86. Ovate, equivalve, brittle, smooth, trans- 
versely striated, with a green cuticle and the margin entire; um- 
bones prominent and rather acute: within purple. 3..3.—S 
America. 
C. Woopiana. Lea. Tr. Am. Ph. 5. t. 18. f. 55. Sub-tri- 
angular, ovate, thick, obtusely angular, anteriorly sub-equilateral, 
convex, shining except on the anterior slope, blackish brown, with 
transverse large wrinkles : beaks large, rounded : inside white, car- 
