298 CONOVULID&. 
cula are short, contiguous, thick, almost conical below, a little 
flattened above, and blunt; the eyes are dull, large, and im- 
mersed at the internal bases; the neck, muzzle and tentacula 
are more or less brindled with lines, points, and transverse 
blotches of dark lead-colour. The foot is elongated, thick, 
rather narrow, rounded at the posteal extremity, and also 
nearly as much anteally, having very obsolete auricles; the 
sole is perfectly plain, without even a longitudinal line m the 
centre, and not a trace of the conspicuous transversely-grooved 
foot of the next genus and species, the Pedipes bidentatus ; it 
is marked with dark-coloured lines above, and is yellowish- 
white beneath; the pedicle of attachment is very long, ex- 
tending nearly throughout the range of the neck to the head. 
That this animal breathes free air is placed beyond doubt. 
T distinctly, repeatedly, and without difficulty observed the 
dilatation and closure of the respiratory perforation at the 
upper angle of the outer lip, precisely as in Helix, and within 
the aperture the rectum is visible, from which the issue of 
feces was seen, as also the network of a part of the branchial 
vault ; thus confirming my observations and conjectures on the 
closely allied genus and species, Pedipes bidentatus, described 
below, and recorded in the Annals of Natural History, vol. vi. 
p- 446, N.S. This result was obtamed by having consigned 
to me, by Miss Cutler, a distinguished naturalist at Budleigh 
Salterton, some fine C. denticulatus, full 4 of an inch long, 
being three times the size of the Pedipes bidentatus, from 
which I drew my first conclusions. These specimens were 
taken in company with the Rissoa ulve, but were very rare, 
from Bostrychia growing in a salt marsh near that place. The 
animal was the ventricose variety. 
This species differs greatly im contour, usually becoming 
ventricosely fusiform as it diminishes in length. The ex- 
amples observed had three columellar plications, the upper 
one the smallest, and a longitudinal callus within the outer 
lip, and one or two rudimental denticles. The locomotion 
is not so active as in Pedipes. The general aspect of the 
animal is decidedly dark, whilst that of Pedipes is nearly 
hyaline white. Its reproduction is im all probability effected 
