72 TESTACEOUS MOLLUSCA. 



bicular, white, anteriorly longer and tlie less obtusely rounded ; with 

 very regular, parallel, oblique striae which on the anterior margin 

 are four or five times refracted and infracted alternately, transverse 

 wrinkles minute ; beak not prominent, -h.— U. State.s. 



T. LiNTEA. Com: Jour?i. A. N. S. Phil. 7. p. 259. f. 20./. 3. 

 Sub-triangular-oval compressed, thickish, with prominent acute 

 concentric lines ; anterior side rather shorter, subacuminated, with a 

 groove separated from the margin by a cai'inated line and obhquely 

 striated, extremity sub-rostated and truncated ; beaks small and 

 acute : lateral teeth distinct. A. — Alabama. 



T. Balthica. Lin. 1120.— D. p. \02.— Born. p. 38. t. 2. /. 

 \4.—Ch.f. 128.— TF. t. A. f. 35. Rounded-triangular, all but 

 smooth, slopes rectilinear, ventral edge arcuated: compressed, the 

 anterior margin not inflected but acute ; apices acute : both within 

 and without rosy and white at the sides : teeth as in Carnaria. 

 ■J^o. — N. Europe. 



t. Trifascata. Lin. WIS.— Gmel. 2>212. -W.t. A. f. 30. 

 Abbreviated-ovate, posteriorly longer, nearly smooth, white, thick, 

 glossy with three red or purple rays : lateral teeth strong. 1 . . 1 ^. 

 — Europe? — Akin to Bimaculata. 



T. Carnaria.* Lin. 1119.— 1>. p. \OQ.—Don. t. 47. — W. t. 

 4. /. 7d—Wood G. C. t. 40. f. 41.5.— Lucina C. Lam. 8.— 

 •C/i f. 126.— List. /. 339./. 176. Sub-orbicular, flesh or rose- 

 colour within afid without ; slightly convex, inequilateral, with 

 delicate minute crowded striae, which are curved and reflected in 

 different directions ; hinge which is placed a little on the posterior 

 side with two small cardinal teeth in one valve and one in the 

 other, and strong laminal lateral teeth. — Diameter ^. — W. Indies. 



T. Balaustina. Lin. 1 1 19.— Payr. Cat. t. \.f. 21, 2.—Poli. 

 l.t. 14. f. 17. Small, rounded- triangular, pellucid, yellowish white 

 with red rays, shining, tumid, equilateral, with elegant transverse 

 striae. ^ . . ^. — 3iediterranean. . 



T. BuRNETi. Brod.and Sow. Z. J. 4. t. 9./. 2. Triangular, 

 the ventral margin rounded, strongly incurved at the fold, one valve 

 flattish, the other rather convex, the sides seri'ated, posterior one 

 falcated, anterior nearly straight : white, concentrically striated, 

 translucent : lateral teeth in one of the valves. ^V • • H- — Mazatlan. 



T. Mera. Say. Am. C. t. 64. /. 2. Rounded, thin, white, 

 rather depressed, somewhat regularly striated transversely ; beaks 

 forming a rather prominent angle, dorsal edges sloping ; anteriorly 

 much shorter, obtuse, with an obvious undulation ; posteriorly 

 rounded ; ventral edge arcuated ; two cardinal teeth in each valve, 

 a single short lateral in one. ^ . .|^. — S. Carolina. 



T. Inconspicua. jBrod. and Sow. Z. J. 40. — Beechey Zool. t. 

 41./. 6. — An. Sanguinolaria FuscA? Conrad. Mar. Con. t. 7. 

 Obovate, sublenticular, posteriorly shorter, white or flesh coloured 



