420 PYRAMIDELLID#. 
rather stronger and broader than in that species. Habitat 
amongst the masses of Annelida and other animals imbedded 
in old oyster-shells from the coralline zone. 
Cu. acuta, mihi. 
Ch. acuta, mihi, Ann. Nat. Hist. N.S. vi. p. 452. 
Odostomia acuta, auct. et Brit. Moll. iu. p. 269, pl. 97. f. 8, 9. 
O. conspicua, Alder ? et Brit. Moll. in. p. 263, pl. 95. f. 6. 
O. turrita, nonnull. No figure. 
O. striolata, Alder ? et Brit. Moll. in. p. 267, pl. 95. f. 5. 
Animal inhabiting a glossy shell of 5-6 rounded volutions 
of a more or less pale livid red, pinkish, or pearly hue; the 
apex is greatly reflexed, and the aperture furnished with a 
conspicuous tooth. The ground colour of the animal is a 
sordid white, mixed with clouded pale yellow, red, or brown 
patches and points, which are irregularly distributed on many 
of the organs; the tissue of the skin is smooth, rarely frosted 
or breaking into a mottled flaky aspect. The mantle is even, 
except that at the upper angle of the aperture there is a very 
evident folded tubular canal, which I have alluded to in the 
preliminary observations on the genus. I will only add, Mr. 
Lowe writes, “pallio ecanaliculato ;’ M. Loven says, “ pro- 
cessus pallii dexter canaliculatus ;” from which it may be 
inferred, that the canal is sometimes present, at others not, or 
not visible. The rostrum is slender, deeply channeled, or 
hollowed-out its whole length, having a cochleariform termi- 
nation, and at the upper surface of its base emits the pro- 
boscis. The tentacula are moderately long, divergent, sub- 
triangular, bevelled, with the margins only slightly folded, 
and the tips are less white and inflated than usual; the eyes 
are rather close at the internal angles. Foot short, opake- 
white, often aspersed on both surfaces with the varying hues 
I have spoken of above, deeply hollowed-out in front, forming 
with the angles long auricles, which, when drawn together by 
the animal, have the appearance of a second pair of tentacula. 
Its posteal termination, at the will of the animal, assumes 
the varying phases of the pointed and obtuse forms, carrying 
at the junction of the foot with the body, on a simple emi- 
