72 TESTACEOUS MOE1A SCA. 



bicular, white, anteriorly longer and the 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. ±.— U. States. 



T. Lintea. Conr. Journ. A. N. S. Phil. 7. p. 259. t. 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 carinated line and obliquely 

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

 acute : lateral teeth distinct. -<fc. — Alabama. 



T. Balthica. Lin. 1120.— D. p. 102.— Born. p. 38. t. 2. /. 

 14.— Ck.f. 128.— W. t. 4. /. 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. 

 7 T i°. — N. Europe. 



T. Trifascata. Lin. 1 118. — Gmel. 3213.- IV. t. 4. f. 30. 

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

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

 — Europe? — Akin to Bimaculata. 



T. Carnaria.* Lin. \\\9.—D.p. 100.— Don. t. 47. -W. t. 

 4. /. 79.— Wood G. C. t. 40./. 415.— Lucina C. Lain. 8.— 

 Ch. f. 126. — List. f. 339./. 176. Sub-orbicular, flesh or rose- 

 colour within and without ; slightly convex, inequilateral, with 

 delicate minute crowded strise, 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 f-. — IV. Indies. 



T. Balaustina. Lin. 1119.— Payr. Cat. t. 1./. 21, 2.— Poll. 

 \.t. 14./. 17. Small, rounded-triangular, pellucid, yellowish white 

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

 striae. J . . £. — Mediterranean. 



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 serrated, posterior one 

 falcated, anterior nearly straight : white, concentrically striated, 

 translucent : lateral teeth in one of the valves. -f 5 . . 1-^. — 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. Brod. and Sow. Z. J. 40. — Becchey Zool. t. 

 41./. 6. — An. Sanguinoi ariaFusca? Conrad. Alar. Con. t. 7. 

 Obovate, sublenticular, posteriorly shorter, white or flesh coloured 



