30 
opaque, white or brown ; beaks very prominent, obtuse ; 
inner margin toothed. 0,17...¢. Rare. 
G. Minvurissima. Turt. B. p.77. t. 6. f. 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. Nivens. Turt. B. p. 56. t. 19. f. 4—F. p. 431. 
Mya N. Mont. Sup. p. 165.—Wern. T. 1. p. 375. t. 
8. f. 4.-—Wood. G. C.p. 101.—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. ¢. Scotland and Devon. 
Grenus.—KELLIA. Turton. 
Somewhat globular, equivalve, closed ; hinge with two 
approximate teeth and a remote lateral tooth in one 
