71 



D. p. 96.^. M. 1. 291. /. 5, Lam. p. 35. List. 

 t. 299. / 136. Turt. B. p. 109. t. 7. /. 2.F. p. 

 436. T. PROFICUA. and FAUSTA. Mont. p. 69. and 

 64. T. RIGIDA. Don. t. 103. Suborbicular, thick, 

 heavy, semitransparent, with one valve less convex than 

 the other, anteriorly shorter; white or yellowish (with 

 usually narrow reddish rays) with crowded transverse 

 furrows which become coarser anteriorly ; beaks often 

 pink; inside yellowish; a simple and bifid cardinal 

 tooth in each valve, two lateral in one valve only. i...2. 

 8. Coasts. 



GENUS. LUCINA. 



bub-orbicular, inequilateral, beaks small, pointed and 

 oblique ; hinge variable, sometimes with two diver- 

 gent teeth, one of which is bifid but changing with 

 age ; two lateral teeth, the intermediate one obsolete ; 

 the posterior nearest the primary ones : two distinct 

 muscular impressions widely separated, the posterior 

 one prolonged. 



L. LACTEA. Lam. 12. Turt. B. p. 112. t. 7./. 4,5. 

 TELLINA L.Lin. 1119. D.p. 99. Bl. t. 72. f. 1. 

 Ch.f. \25.-Mont.p. 70. t. 2.f. 4. Lin. T.S.p. 56. 

 Dor. Cat. p. 30. t 5./. 9. Turt. C.D.p. 176. 

 LORIPES L. F. p. 430. Orbicular, equilateral, with 

 fine irregular concentric strise, thin, rather compressed. 



