APPENDIX. 
or 
bo 
wt) 
CHEMNITZIA CONOIDEA.—(P. 422.) 
The tentacula have moderately large, terminal, flake-white 
inflations. The continuation of the upper part of the rostrum 
with the neck is most apparent and cannot be mistaken, the 
Junction being only invaded by the span of the tentacula and 
insertion of the eyes. The rostrum is slightly grooved from 
the point of the emargination to the centre of the tentacular 
veil, under which, just below the eyes, is the proboscidal 
fissure. 
CHEMNITZIA RUFA.—(P. 423.) 
The rostrum is spotted with small flake-white points, parti- 
cularly on and between its grooved central lines. 
The eyes are on the bases of the short, broad, very little 
folded, triangular tentacula, the tips of which are not decidedly 
marked with the characteristic apical inflation. 
CHEMNITZIA SPIRALIS.—(P. 425.) 
This is a review of the original notes; there is little to add. 
The rostrum, in quietude, shows an inflation on which the 
proboscidal fissure may be detected, with the high power of a 
Coddington lens, in certain lights; when in motion, it loses 
the finely corrugated prominence, becomes attenuated in the 
middle, and has a spatulate rounded termination that rarely, 
when in action, simulates an emargination or hollowing-out. 
CHEMNITZIA INTERSTINCTA.—(P. 426.) 
With regard to the animal inhabiting the shell with flat 
volutions, we have to add, that when the foot or the rostrum 
is by excitement produced beyond the usual extent, it becomes 
greatly hollowed out, and the auricular points increased in 
length; but this condition is common to all the Chemnitzie, 
and when tranquillity is restored, the organs revert to the 
form we have described. The animal is shy and sluggish, and 
often marches with the eyes under the margin of the shell. 
Whether the tumid shell mentioned m our description of 
