C4 TESTACEOUS MOLLUSCA. 



carnata. Poll. 1. t. 15. f. 1. Oval-oblong, sub-inequilateral, 

 pointed at the rather shorter anterior extremity, flat, pinkish flesh 

 colour, with two paler anterior rays, finely striated concentrically : 

 hinge with two cardinal and one lateral tooth in one valve ; one 

 cardinal in the other. 1 ..2. — Mediterranean. 



T. Pulchella. Lam. 23.— Born. t. 2. /. \0.~Poli. 1. t. 15. 

 f. 8. — W. S. t. 1./. 4. Small, ovate-oblong, depressed, shining, nar- 

 row, pale with numerous rosy rays and fine transverse striae : anterior 

 extremity beaked and rather shorter : hinge with at least one lateral 

 tooth. — Mediterranean, Gidf of Tarentum. 



T. Fabula.* GW. 3239.— D. p. 92.— Lam. 24.— Bon. t. 

 97.— Turt. B.j). 101.— W. t. 3.f. 23.— Wood. G. C.t. 45. /. 4. 

 Ovate, posteriorly rounded, anteriorly contracted ; thin, glossy, 

 white, one of the valves obliquely striated the other smooth : hinge 

 with a single tooth and minute adjacent denticle in one valve, in the 

 other two with a rounded lateral one. i..f. — N. Europe* 



T. Tenuis.* Lam. 25.— Dor. Cat. t. 5. f. 3.—Turt.B.p. 

 107.— Wood. G. C. t. 44. f. 3, A.— List. t. 405./. 251.— Ch.f. 

 117.— Don. U 19./. 2.- W. t. 3./. 22.— T. Balaustina. D. p. 

 93. Ovate-triangular, rather truncated and angular at the anterior 

 extremity, reddish with generally deeper bands, thin, rather flat, 

 nearly smooth and polished. — England, <§'c. 



T. Exilis. Lam. 26.— E. 3. p. 1013.— Del. t. 6./. 6. Ovate- 

 triangular, very thin flattened and pellucid, pale crimson, with very 

 fine transverse striae, and obtusely angular at the short and oblique 

 anterior extremity : no lateral teeth. \. 



T. Donacina.* Lin. 1118.— D. p. 89.— Lam. 27.— Turt. B. 

 p. 102. t. 8./. 4.— W. t. A.f. 31.— Mont. t. 27. / 3.— T. Varie- 

 gata. Pali. 1. t. 15./ 10. Oval with the beaks close to the 

 anterior extremity, which being abruptly sloped puts on the ap- 

 pearance of a Donax, finely striated concentrically, semi-transparent, 

 yellowish within and without with red often interrupted rays : hinge 

 in one valve with a bifid cardinal tooth, an additional simple one 

 and lateral teeth on each side in the other. — Mediterranean, $c. 



T. Nitida.— Poll. 1. t. 15./ 2. 34.— Lam. 28.— Phil. p. 27. 

 — Gual. t. 77- Oblong, very compressed, equilateral, anteriorly 

 narrowed, polished, pale flesh-colour with tawny zones, ligamental 

 edge straight, with delicate and regular transverse striae, anteriorly 

 in one valve, with coarse and distant ones : inside tawny orange, no 

 lateral teeth, a single bifid cardinal in one valve, a bifid and simple 

 smaller one in the other. If. — Mediterranean. — Variety, whitish 

 or sulphur-coloured. 



3 We have given a copy of the Fragillissima of Ch. f. 101. the 

 Vitrea of Gmelin (D. p. 92.) which bears much resemblance in shape 

 to this species, but has no lateral tooth. 



