Tigh TESTACEOUS MOLLUSCA. 
bicular, white, anteriorly longer and the less obtusely rounded ; with 
very regular, parallel, oblique striz which on the anterior margin 
are four or five times refracted and infracted alternately, transverse 
wrinkles minute ; beak not prominent. 4.—U. States. 
T. Lintea. Conr. Journ. A. N.S. Phil. 7. p. 259. t. 20.f. 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. +.—Alabama. 
T. Batruica. Lin. 1120.—D. p. 102.— Born. p. 38. t. 2. f. 
14.—Ch. f. 128.—W. t. 4. 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: teethas in Carnaria. 
1,10, N. Europe. 
T. Trrrascata. Lin. 1118.—Gmel. 3213.—-W.t. 4. f. 30. 
Abbreviated-ovate, posteriorly longer, nearly smooth, white, thick, 
glossy with three red or purple rays: lateral teeth strong. 1..1}. 
— Hurope?—Akin to Bimaculata. 
T. Carnarta.* Lin. 1119.—D. p. 100.—Don. t. 47.—W. t. 
. f. 79.—Wood G. C.t. 40. f. 415.—Lucina C. Lam. 8.— 
Ch, f. 126.—List. t. 339. f. 176. Sub-orbicular, flesh or rose- 
colour within and without; slightly convex, inequilateral, with 
delicate minute crowded striz, 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. Baraustina. Lin. 1119.—Payr. Cat. t. 1. f. 21, 2.—Polt. 
1.¢. 14.17. Small, rounded-triangular, pellucid, yellowish white 
with red rays, shining, tumid, equilateral, with elegant transverse 
strie. 3..4—Mediterranean. 
T. Burnetr. Brod.and Sow. Z. J. 4.t. 9. f. 2. Triangular, 
the ventral margin rounded, strongly incurved at the fold, one valve 
flattish, the other rather convex, the sides serrated, posterior one 
faleated, anterior nearly straight: white, concentrically striated, 
translucent : lateral teeth in one of the valves. 3, .. 14.—Mazatlan. 
T. Mera. Say. Am. C. t. 64. f. 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. 2..32.—S. Carolina. 
T. Inconspicua. Brod. and ‘Sow. Z. J. 40. — Beechey Zool. t. 
41. f. 6.— An. SancurnocaRia Fusca? Conrad. Mar. Con. t. 7. 
Obovate, sublenticular, posteriorly shorter, white or flesh coloured 
