Pvn H,i I'UitlS

LIMA.
B. Shell inequilateral, with an oblique outline.
4, L. Loscom'bii *, G. B. Sowerby.
L. Losco?nbii, Sow, G-en. Sh. (Lima) f. 4 ; F. & H. ii. p. 265, pi.
85
liii. f. 1-3.
Bod y bright orange-colour : mantle haying its edges over-
lapping one another in front : tentacles of different lengths,
ringed or verticillate as in some Nudibranchs, and arranged
in several irregular rows ; the front row is folded back over
the outer edge of the shell : foot cylindrical and extensile,
reddish-orange.
Shell rhomboidal, twisted to one side, extremely convex,
thin, rather glossy : sculpture, 50-60 very fine and sharp ribs
or fluted striae, which radiate from the beaks to the front and
sides, but become faint or absent on the sides and near the
hinge ; the ribs are slightly flexuous and of unequal size,
often alternately large and small, or two or three small ribs
between some of the larger ones; there are also the same
microscopical transverse lines as in L. subauriculata and other
species, producing a similar serrature or corrugation of the
ribs : colour snow-white : margins thin, oblique, bluntly
rounded in front, ventral edge compressed and nearly straight,
posterior edge rounded and sloping from the front and hingeline
to an obtuse angle about one-third down; the valves
when closed gape a little on the upper part of the dorsal side :
beaks extremely prominent and gibbous, projecting considerably
beyond the hinge : ears triangular and veiy small, wrinkled
in the line of : growth cartilage large and yellow : ligament
thin, olive-green: hinge-line nearly straight, slightly
curved outwards : hinge-plate narrow and sharp : cartilagearea
broad ; triangular space on each side of the beaks and
within the ears small, but supported by a stout and somewhat
incurved : ledge
inside pearly, slightly granular, showing (al-
front mar-
though faintly) the impression of the outside ribs ;
gin crenulated in young, but thickened in adult specimens :
muscular and pallial scars distinct. L. 0*8. B. 0*55.
Habitat :
With
the last species, and equally distri-
buted, but usually not so common nor at such great
* Named in honour of Mr. C. W. Loscombe, who discovered this and
other shells at Exmouth.