422 PYRAMIDELLIDZ. 
forms, each differs greatly in the contour and colour of its 
individuals; it is, after the C. pallida, the most variable of 
the Chemnitzie. 
Cu. conorpEa, Brocchi. 
Odostomia conoidea, Brit. Moll. iii. p. 260, pl. 95. f. 4. 
Animal inhabiting a spiral shell of eight volutions, hyaline 
bluish-white throughout, slightly shot with flake-white cloudy 
matter; mantle plain. Rostrum deeply emarginate, forming 
two minute leaves turning to the right and left, with a 
narrow depressed line dividing them in the centre, as far as 
the eyes; they almost represent a second pair of tentacula. 
Proboscidal orifice at the termination of the groove close 
under the eyes. In some specimens the scission of the 
rostrum nearly extends to the eyes. The true tentacula are 
subtriangular, flat, bevelled, not very short, rounded at the 
tips, slightly setose. The eyes are very black, situated exactly 
at the internal bases of the tentacula immersed in the skin, 
and so close to each other that a hair can scarcely be laid 
between them: I never saw the eyes so contiguous in any 
other mollusk. Foot large, rather long, membranous, gently 
reflected at the sides on itself, which reflexion it im some 
measure retains on the march, deeply arcuated in front, 
causing the auricles to be pomted, and gradually tapermg 
to a subtriangular termimation. The usual operculum of 
the tribe is carried on a simple lobe in an advanced position 
nearly at the junction of the foot with the body. The animal 
is vivacious, displays the eyes on the march, and makes rapid 
progression ; it is only obtained at Exmouth in the coralline 
zone, and is rare. 
A splendid series of all sizes of this beautiful species has 
been examined, and I have little more to observe, except that 
I find it has a slender and tumid variety. 
Cu. rurA, Philippi. 
Ch. rufa, Brit. Moll. i. p. 245, pl. 93. f. 3. 
Ch. formosa, Brit. Moll. ii. p. 248, pl. 93. f. 5, and iv. p. 274. 
Animal inhabiting a shell of fourteen flat plicated volutions 
