Pvn H,i I'UitlS

188 GALEOMMIDJE.
are said to be provided with teeth ; so that either the
generic character in that respect requires alteration, or
the species in question may belong to Lepton or an
allied genus.
The Galeommata inhabit rocky ground, and are found
at various depths, from low- water mark to the coralline
zone. An account of their habits, so far as they are
known, will be given presently, among other particulars
of our unique species.
Galeomma Turto'ni *J Editors of the c
Journal/
Zoological
G. Turtoni, Turton in Zool. Journ. ii. p. 361, tab. xiii. f. 1 ; F. & H. ii.
p. 105, pi. xxsv. f. 11, and (animal) pi. O. f. 5.
Body pure white : mantle partly closed in front, with an
opening for the foot, of a thin texture, except at the edge,
which is muscular and forms a tumid cord extending beyond
the shell ; from this cord is thrown off a double wavy margin,
one flake of which is stretched like an extremely thin skin
and covers the shell, and the other or inner margin is marked
with equidistant frosty-white tubercles or ocelli, 8 or 9 on
each side, with fine white intermediate filaments : incurrent
tube at the anterior side, wide, irregularly sinuous, and not
always present: excuvrent tithe at the posterior side, small,
with a plain orifice :
size :
gills of equal lips 2 on each side,
more coarsely pectinated than the gills, of which they appa-
rently
form a continuation :
foot worm-like, cylindrically
close to
tapering to a point ; the byssal groove is at its heel,
the body.
Shell transversely oblong, much compressed towards each
end, thin, opaque except when held up to the light, of a glistening
aspect : sculpture, numerous and delicate ribs, which
radiate from the beak to the margins, curling round towards
the back or hinge-area, and branching off (especially in front)
at irregular intervals ; these ribs are crossed by still more
numerous and fine transverse or concentric striae, and by their
* Named in honour of Dr. Turton, the well-known author of several
works on British Conchology.