~~) 
Qy 
iviangular, yellowish white, with numerous fine laminar 
equidistant slightly reflected cencentric ridges, which 
anteriorly become confluent in pairs extending beyond 
the edges so as to form a fringe of short obtuse spines, 
which turn back and form a cavity for the cartilage 
beaks small, subcentral, lunule long and narrow: a 
single cardinal and two lateral teeth in one valve, two 
cardinal in the other, the lateral obscure. +. W. Coasts, 
rare. 
L. Carnaria. Lamw.—F. p. 442.—Tewiina C. 
Inn. 1119.—Ch. f. 126.—Mont. p. 73.—Don. t. 47. 
—Iin. T. 8. p. 57.—Dor. Cat. p. 31. t. 5. fi 6.— 
Wood. G. C. p. 189. t. 40. f. 4, 5.—D. p. 100.— 
Turt. C. D. p.177,—Srrieriia C. Turt. B. p. 118. 
é, 7. f. 15.—Rounded oval, inequilateral, more or less 
tinged with rose-color, rather compressed. marked in 
the middle with oblique longitudinal striz, which, at 
at the shorter end, are curved and flexuous, and at the 
produced end with straight ones, which meet the ob- 
lique ones and form angles ; beaks near one end: hinge 
with two cardinal (one bifid) and a lateral tooth in each 
valve. + W. Coasts. 
L. Pistrormis. Lin. 1120.—F. p. 442.—Wood. 
G.C. p. 194.—D. p. 102.—Turt. C. D. p. 178.— 
p 2 
