74 



54. Pen. b.p. 181. Wood. G. C.p. 183. t. 42. /. 

 4.5. Turt. C. D. p. 175. VENUS BOREALIS. Don. 

 4. t. 130. V. SPURIA. D. p. 194. Lenticular, con- 

 vex, dirty white, with numerous raised transverse thread- 

 like striae (which become indistinct in old shells, 

 towards the margin), the interstices broad and shallow ; 

 inside dull chalky white ; beaks central, pointed, and 

 a little curved; a small lunule ; two teeth (one bifid) 

 in each valve. \%. W. and Irish Coasts. 



L. SINUOSA. Lam. 17. L. FLEXUOSA. F. p. 442. 

 Gould, p. 52. TELLINA F. Mont. p. 72. Lin. 

 T. 8. p. 56. Wood. G. C. p. 188. t. 47. /. 7, 8. 

 D.p. 99. Turt C. D. p. 177. VENUS SINUOSA. 

 Don. t 42. f. 2. CRYPTODON F. Turt. B. p. 121. t. 

 l.f. 9, 10. Suborbicular, longer than broad, very con- 

 vex, pure white, thin, pellucid, marked with minute 

 irregular concentric wrinkles, and a longitudinal furrow 

 extending from the apex parallel to the cartilage slope, 

 and forming a deep incurvation in the margin at its 

 termination : hinge with a single obscure penetrating 

 cardinal tooth, f . S. Coasts. 



L. SPINIFERA. VENUS S. Mont. p. 577. t.Yl.f. 1. 

 Lin. T. 8. p. 78. D.p. 163. Turt. C. D.p. 231. 

 MYRTEA S. Turt. B. p. 133. P.p. 443. Oval 



