45 
L, Evurpetica. Lam. 2.—Turt. B. p. 65.—M acTRa 
Lurraria. Lin. 1126.—D.p. 146.—ChA. f. 240,1.— 
List. t. 415, f. 259.—Don. 2. t. 58.—Pen. 4. p. 195. 
t, 55. f. 3.— Mon. p. 100.—Inn. T. 6. ¢. 16. f. 3, 4. 
—-Dor. Cat. p. 32. t.5. f. 11.—Turt C.D. p. 84.— 
L. Vurearis. F. p. 464.—Oblong, subequivalve, 
marked only by the lines of growth and remote obsolete 
ridges, longer anteriorly, rounded and slightly gaping 
at both ends, yellowish white under a thin close cuticle. 
2...33. In sand, about low water mark. 
LL. Compressa. Lam. 4. and L. Prperata. Lam. 5. 
—Macrra. P, Gmel. 3261.—ListERa. C. Turt. B. 
p. Ol. t. 5. f. 1, 2.—D. p. 142.—Ch. f. 21.—E. M. 
t. 257. f. 4.—Mact. Compressa. Mon. p. 96.— 
TeLLINA Prana. Don. ¢. 64. f. 1.—Da. C. p. 200. 
t. 13. f. 1—Bl. ¢. 77. f. 2.—Rounded-triangular, 
thin, compressed, yellowish white, finely but irregularly 
striated transversely, semi-pellucid; beaks very small 
and central; a distinct lozenge edged with a raised 
line ; a single tooth in one valve locking into a bifid in 
the other, no lateral teeth. 14...14. Muddy shores. 
Grenus.—MACTRA. 
Transverse, inequilateral, subtrigonal, sides slightly 
gaping; beaks prominent ; one primary compressed 
