Pvn H,i I'UitlS

384 TELLIXIDiE.
6. T. squa'lida*, Pulteney.
T. sqtealida, Pult. in Hutch. Dors. p. 29. T. incarnata, F. & H. i. p. 298,
pi.
xx. f. 5.
Body whitish with a rosy or fleshcolour tint : mantle having
its edges strongly fringed : tubes speckled ; orifices plain : foot
large.
Shell triangularly oval, somewhat inequivalve (the left
valve being larger than the right), flattened, rather thin but
almost opaque, of a satiny lustre :
sculpture, numerous and
fine concentric striae, which are more close-set in the young
and afterwards become slightly laminar and imbricated ; the
posterior side has none of these striae, but is marked across
with oblique, flexuous, and more compact striae, giving that
side a rough or scabrous appearance ; the right valve is more
striated than the left; the surface is also covered with the
same parallel and microscopical striae as are observable in the
last species : colour pale orange or yellow, with often a reddish
mark near the beaks and occasionally one or two faint longitudinal
rays of a whitish hue on the posterior side, which extend
from the beaks to the lower margins of the fold : epidermis
fibrous and brown, usually rubbed off except at the edges :
margins rounded in front, semioval on the anterior side, ab-
ruptly sloping upwards, and produced at the posterior end to
a sharp point something like that of a ploughshare ;
the poste-
rior side is decidedly flexuous, as well as obliquely truncate ;
the dorsal margin on the posterior side is straight, and that
side is divided lengthwise by two more or less deep and dis-
tinct furrows, which run from the beak to the posterior angle :
beaks projecting, small, pressed together and worn by the con-
tact, turned towards the posterior side : ligament rather large,
prominent, dark horncolour, separating the valves by a long
lanceolate gap or depression : hinge-line obtusely angular :
hinge-plate rather narrow : teeth, cardinals as in T.fabula ; the
right valve only has a lateral, placed
on the anterior side near
the beak and of an obtusely triangular shape : inside polished,
longitudinally striated towards the margin,
coloured more
deeply than the outside : pallial scar large, of the same shape
as in all the other species of this section : muscular scars simi-
lar to those of T. fabula. L. 1*1. B. 1-8.
Habitat :
Not
common, on sandv coasts of the
* Hough.