opaque, white or brown ; beaks very prominent, obtuse ; 

 inner margin toothed. 0,17. ..i. Rare. 



G. MINUTISSIMA. Turt. B.p. 77. t. 6./. 15. F. 

 p. 429. MACTRA M. Mont. Sup. p. 37. D. p. 143. 

 Turt. D. p. 83. Resembling the last but not quite 

 so angular nor so long in proportion, and the inner mar- 

 gin quite entire. Devon and Cornwall. Minute. 



GENUS. ERVILIA. TURTON. 



Oval, equivalve, inequilateral, closed; hinge with a sin- 

 gle erect tooth closing between two small divergent 

 ones in the opposite valve ; lateral teeth none : liga- 

 ment internal. 



E. NITENS. Turt. B.p. 56. t. 19./. 47^.^.431. 

 MYAN. Mont. Sup. p. IQS. Wern. T. I. p. 375. t. 

 8. f. .-Wood. G. C.p. \Q\.D.p.47.Turt. D. 

 p. 102 Oval, flattish, pale pink, a little tapering at the 

 longer side and rounded at both, finely and regularly 

 striated transversely; beaks prominent, margin entire. 

 0,17. i. Scotland and Devon. 



GENUS. KELLIA. TURTON. 



Somewhat globular, equivalve, closed ; hinge with two 

 approximate teeth and a remote lateral tooth in one 



