w2 
white or yellowish; beaks pointed, prominent and 
curved, lunule small and cordiform ; inside polished 
round the area of the margin ; in one valve a single 
plain tooth closing between two plain ones in the other ; 
internal cavity oblique. 4. Torbay and British 
Channel. 
L. Levcoma. Turt. B. p. 113. ¢. 7. 7. 8.—Lorrpzs 
L. F. p. 430.—VJrbicular, rather oblique and inequi- 
lateral, anteriorly a little produced and angular, and 
generally a little flexuous under the beaks posteriorly ; 
convex, chalky white, marked with regular crowded 
transverse raised striz and deeper wrinkles (sometimes 
crossed by extremely fine and close set radiating lines) ; 
beaks prominent with a curvature under them; inside 
and hinge as in Lactea. #@. Torbay, British Chan- 
nel and Guernsey. 
L. Asa. Turt. B. p. 114. ¢. 7. f. 6,7.—Orbicular, 
convex, glossy white, with rather remote regular trans- 
verse striz ; hinge with two teeth in one valve, one in 
the other; internal cavity nearly ina straight line. @. 
British Channel and Guernsey. More rounded than 
the last and with no appearance of longitud- 
nal lines. 
