*) 
wt 
. 
~~ 
thin, transparent, glossy, brilliant white, reflecting me- 
tallic colours, anteriorly tapering to a point, posterior] y 
rounded ; beaks small, pointing towards the longer sid 
Yr side: 
inside smooth, glossy, hinge with a plain denticle and 
lateral teeth. W. Coasis, Scotland. 4...1. 
A. Tenvs. Lam. 8.—Turt. B. p. 53°-—F. p, 433.— 
Mactra T’. Mont. p. 572. t.17.f. 7.—Pen. 4. p. 194. 
—ILin. T. 8. p.72.—Dor. Cat. p. 33.—D. p. 142.— 
Turt. C. D. p. 84.—Sub-triangular, equilateral, com- 
pressed, thin, glossy white, pellucid, ventral edge 
rounded ; hinge with a cloven and a remote lateral 
tooth in one valve, a single plain tooth in the other. 
3...0,40. WS. Coast. 
A. Boysi1. Lam. 7.—Turt. B. p. 53. t. 5. f. 4&5. 
—Licura B. Mont. p. 98. t. 3. f. 7—Mactra B. 
Pen. 4. p. 195.—Lin. T. 8. p72. t. 1. f. 12.—Dor. 
Cat. p.93. #.12. f. 7—D. p. 1438.—Turt. C. D. p. 
84.—M. AtBa. Wood, Inn. T. 6. p. 174. t. 16. f. 9. 
to 12.—Amp. A. F. p, 433.—Ovate, subtriangular, 
rounded at both ends, anteriorly shorter, thin, com- 
pressed, glossy white, sloping from the beak at both 
ends, ventral edge rather suddenly rounded: a single 
umbonal denticle in each valve and a large lateral tooth 
on each side in one valve. 
2—%. Common on Sandy 
Coasts. 
