CHEMNITZIA. 439 
N.S. vol. vii. p. 387, that there are two varieties of this spe- 
cies : one, with turreted subangular volutions, which is consi- 
dered the type, under the title of Chemnitzia scalaris; the 
other, with rounded volutions, which has the specific appellation 
of C. rufescens. I have taken both alive, and could detect no 
difference in the animals, except in colour; the C. scalaris 
being sometimes subhyaline frosted-white, at others pale red- 
brown, and the same variations attend the so-called C. ru- 
fescens. I may be in error as to the identity of the two, but 
that is my present impression. 
Aug. 10th, 1853.—I took this day at the same haul two 
shells, one of which proved to be the typical C. scalaris, the 
other was the form termed by authors C. rufescens ; they were 
both put in a vase, and being lively, I again saw that their 
organs were identical. 
Cu. acicuxa, Philippi. 
? Eulima acicula, Philippi. 
Eulimella acicula, Brit. Moll. ui. p. 311, pl. 98. £.9,10; and iy. p.283. 
? Eulimella affinis, Brit. Moll. in. p. 313, pl. 98. f.7; and iv. pp. 274 
& 283. 
The animal inhabits a smooth, bluish-white, subhyaline shell 
of eight flat volutions, and has the reflexed apex, the constant 
characteristic of the Chemnitzie. The mantle is even with the 
shell, with the exception of the small fold I have alluded to 
above ; the body volution does not nearly equal half the entire 
length of the shell. The general colour of the animal through- 
out is subpellucid frosted-white, mixed with minute snowy 
flakes. The head or rostrum is, when fully extended, rather long, 
very broad, square in front, slightly emarginate in the centre, 
and on the march is always in advance of the foot, as is usual 
with the muzzle of the Rissoe ; it is grooved the whole length, 
and the groove is continued towards the neck, just separating 
the tentacula at their basal centre; at its upper surface, close 
to the base, is the orifice of the proboscis. The tentacula 
diverge almost at right angles, and resemble short, broad, 
minute leaves, each with an opake white stripe or stamen 
through the centre; they bevel to a fine edge, and with their 
large flexible margins can, like those of all the Chemnitzie, 
