TRIBE NYMPH ACE A. 6j 



T. Scalaris. Lam. 29. Ovate, rather compressed, yellowish 

 white, with elegant transverse striae ; anterior side the shorter and 

 sub-biangulated. If-.-— In shape and stria? not unlike the fossil 

 Scalar oides. (An'.'du Mas. vol. I.t 41./. 7.) 



T. Psammotella. Lam. 30. — Ch. f. 87 ? Ovate, with very 

 fine transverse striae, and angulated and sinuated on the anterior 

 side which is the shorter one; whitish with the beaks rosy and the 

 interior imperfectly and unequally rayed with orange and purple or 

 rose colour. \f. — not unlike Ch. 1654. 1 



T. Lantivyii. Payr. Cat. t. \.f. 13, 4. Small, ovate- 

 triangular, thin, compressed, white, pellucid, shining, very inequi- 

 lateral, with elegant transverse striae : posterior side the longer and 

 rounded, anterior shortened and angulated — Corsica. 



T. Oudardi. Payr. Cat. t. 1. f. 16, 7, 8. Oval compressed, 

 shining, pellucid, red within and without, obliquely cancellated and 

 adorned by transverse white lines and rather small longitudinal red 

 ones, and with reddish yellow rays at both extremities. — Corsica. 



T. Clathrata. Quoy. Ast. t. 81./. 4, 5, 6, 7. Small oblong 

 transverse inequilateral, posterior side the shorter and truncated ; 

 thin, fragile, white rosy or red with a kind of lattice work composed 

 of oblique and transverse striae ; posterior sinus scarcely evident. — 

 South Seas. — Not unlike Fabula, but the oblique stria* are on both 

 valves. 



T. Polita. Say. Jour. A. N. S. Phil. 2. p. 27>>. Sub-tri- 

 angular, white, minutely wrinkled concentrically; anterior side rather 

 shorter, its dorsal edge sloping in a straightish line to a sub-acute 

 termination ; ventral edge nearly straight from behind the middle 

 to the anterior end, a lateral posterior tooth, f. .«|f. — South 

 Carolina, §c. 



T. Tenera. Say. Jour. A- N. S. Phil. 2. p. 303.— Gould. 

 M. f. 44. Oblong, sub-oval, longer posteriorly, very thin, pel- 

 lucid, compressed, whitish, irridescent, concentrically wrinkled, 

 the ventral edge arcuated ; cardinal teeth two, the larger one emar- 

 ginate, the posterior tooth little elevated, anterior obsolete, -f^ . . ^. — 

 New Jersey. 



T. Tenta. Say. Am. C. t 65./ 3.— Gould. Mas. p. 68. f. 

 43. Small, thin 5 oval, white, shining, not polished, shorter and 

 narrowed anteriorly, but rounded and obtuse at the tip, ligamental 



1 Allied to, if not identical with this, is the T. Oblonga. Gmelin. 

 3234. — Chemnitz, f. 87. — Dp. 80. Oblong, smooth, thin, convex, 

 whitish with a tinge of orange which is strongest near the umbones ; 

 posteriorly rather longer, rounded ; anteriorly obtusely angulated, 

 with a distinct flexure ending in a sinus at the margin : ventral edge 

 little arcuated ; inside pale orange, hinge with a bifid and a narrow 

 simple cardinal tooth in each valve: no lateral teeth. %..\\.— 

 S. America? 



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