TRIBE MACTRACEA. 27 
lanceolate, solid, white, tapering anteriorly oblique: slightly gaping 
anteriorly; a distinct lozenge, edged with a raised line ; anterior 
lateral teeth wanting in the adults. —Prince of Wales’ Island. 
L. Ensts. Quoy. Ast. t. 83. f.5, 6. Elongated-ovate, narrow, 
transverse inequilateral, arcuated, yellowish-grey, with irregular 
transverse grooves ; anterior side rounded and very short. 3.—N. 
Zealand. 
* * Orbicular or sub-triangular. 
L. Compressa. Lam. 4.—L. Preerata. Lam. 5.—BI1.t.77. 
f. 2.—Mactra Prrerata. Gmel. 3261.—D. p. 142.—Ch.f. 21. 
—F. t.257. f.4,—M. Listeri. W.t. 6. f. 25.—Treiiina PLana. 
Don. t. 64. f. 1.—Lieuta C. Mont. p. 96.—Lisrera C. Turt. 
B. p. 51. t. 5. f. 1. Thin, compressed, triangularly rounded, 
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 looking into a bifid 
one in the opposite, no lateral teeth. 14...14.—Hurope. 
L. TeturnoipEs. Lam. 6.—Deles. t. 3. f. 5.  Ovate, sub- 
triangular, thin, pellucid, white, with fine, unequal, transverse, stric; 
posterior side short, obliquely truncated, and somewhat plaited. 1. 
— Guinea?! 
L. Canpipa. Lam.7. Ovate, thin, pellucid, white, with un- 
equal transverse strize : posterior side the longer. 
L. Papyracea. Lam. 8.—Sow. G.—Reeve, t. 41. f. 2.— 
Macrra Recurva. W.S. f. 2.—An. L. Lineata. Say. Am. 
Conch. t. 9. Roundish-ovate ; thin, pellucid, transversely striated, 
with very fine longitudinal strize in an isolated place near the 
anterior side, which is widely gaping and marked with an-elevated 
longitudinal line on each valve.—Jndian Ocean. 
L. Purcatetta. Lam. 9.—An. Mactra Papyracea Gmel. 
3257 ?— D. p. 133?—Ch. f. 231? Ovate-rounded, thin, pellucid, 
white, with numerous fine transverse plaits ; anterior side short and 
sub-angulated.— VV. America.* 
1 This species is in ali probability the Tellina Angulata of Lin- 
neeus, whose own specimens are undoubtedly Lutrariz:. Ihave given 
copies of Delessert’s figure of Tellinoides and Wood’s Angulata. 
T. Ancuxata. Lin.—Ch. f. 75.—D. p. 75.— Wood, G. C. p. 
146. t. 43. f. 1.—W.t. 3. f. 5. Triangular-ovate, anteriorly much 
shorter, bent and angulated ; white, sub-inflated, nearly smooth, ven- 
tral edge but little curved, ligament very small; no lateral teeth. 
* It is not absolutely impossible, that this at present rather doubt- 
ful species, may prove to be identical with the 
L. Canauicunata. Say Jour. A. N. S. Phil. 2. p. 311.— 
Macrra Campecuensis. Gray in W. S. t. 1. f. 3.—An. 
