Pvn H,i I'UitlS

330 VENERIUM.
formis of J. Sowerby, and (according to Morch) the Cytherea
albida of Bolten.
2. V. lincta*, Pulteney.
V. lincta, Pult. in Hutch. Dors. p. 34. Artemis lincta, F. & H. i. p. 431.
pi. xxviii. f. 5, 6.
Body suborbicular, greyish-white : mantle having its edges
thickened and closely fringed with short tentacular cirri : tubes
pale yellow, capable of an extraordinary degree of extension,
viz. to nearly three times the length of the shell ; they are
united except at the openings, where they are speckled with
flake-white and faintly streaked lengthwise with brown ;
orifices (as in V. ovata) encircled by a ring of purplish-brown
and fringed with cirri :
foot large, broad, and wedge-shaped.
Shell roundish, with a triangular outline, convex, solid,
opaque, of a silky lustre : sculpture, very numerous, and flattened
but fine, concentric laminae, imbricated as in V. eocoleta,
and becoming coarser and more erect at the sides ; the surface
is also covered with the microscopical lines observable in that
species : colour milk-white, tinged with pale yellow or light
brown towards the beaks, which are often of a pink hue : epidermis
very slight, yellowish-white, disappearing in the adult :
margins representing
in front and at the sides an arc of three-
fifths of a circle ; that of the anterior side on the upper part
is somewhat excavated by the lunule and bluntly angulated ;
the posterior margin is less rounded, and impressed by an in-
distinct fold or flexure, which extends from the beak along
that side ; the dorsal margin is long and slopes obliquely, or
is more or less curved to the point of the posterior angle :
beaks rather prominent and obliquely recurved : lunule as in
V. exoleta, but colourless : corselet rather broad and shallow :
sunk within the corselet :
ligament long, horncolour, deeply
hinge-line rounded or obtusely angled : hinge-plate thick,
broad, and flexuous: teeth the same as those of V. exoleta,
valve the smallest tooth on the an-
except that in the right
terior side is more laminar and oblique, and the left valve has
two similar teeth in the same position to receive the opposite
one : inside dull chalky-white, all but the scars, which are
polished and prismatic ; margin thickened and bevelled : scars
i large &* and well defined. L. 1-3. B. 1*3.
* Licked with the tongue, or polished.