CHEMNITZIA. 44] 
extends to the bottom of the second basal volution ; anteriorly 
it forms a concave sweep, ending on the right and left in very 
shght auricular points ; posteriorly it has a moderate lanceolate 
shape, carrying, on a simple lobe close to its junction with 
the body, a light corneous, pyriform, obliquely-striated oper- 
culum. This elegant little creature is very vivacious, and 
free from shyness. 
Habitat: muddy ground, in 10 fathoms water, six or seven 
miles from the land, off Exmouth. 
It is one of the undescribed species. 
Cu. inscutpta, Montagu. 
Odostomia insculpta, Brit. Moll. iii. p. 289, pl. 96. f. 6; and iv. p. 280. 
The animal occupies an ivory-white shell of five moderately 
rounded volutions, with well-marked, but not oblique, sutural 
lines; the three lower whorls at the basal portions have very 
fine, distant, either concentrically circular or spiral strie. 
The colour is opake frosted-white, with a rather large patch 
of dull claret-red on the neck. The mantle has the usual 
fold at the upper angle of the aperture. The rostrum is 
short, cloven nearly to the eyes, with the segments arcuating 
as in C. obliqua. The tentacula coalesce at their bases, and 
are very broad and short, which condition may, in some 
measure, be owing to the margins not being folded in the 
auriform fashion on the march ; they terminate in very small, 
white, slightly inflated tips; the eyes are close together at the 
internal bases. The foot appeared short and broad as the 
animal moved in slow march, but perhaps, if the pace had 
been accelerated, it might have been somewhat extended; in 
front it is gently concave, with blunt auricles, close under 
which it becomes a little constricted, and terminates in a deep 
regular emargination carrying on a plain lobe a remarkably 
thin, light horn-coloured, narrow, subelongated, obliquely- 
striated operculum. 
It inhabits a shelly bottom im 14 fathoms water, six 
miles from shore at Exmouth. It has not been examined 
before. 
