444 PYRAMIDELLIDZ. 
this simple acknowledgement of rare merit, lest I should 
offend those retiring sensibilities, which are always the con- 
comitants of true science. 
This elegant shell, of five and a half rather tumid volutions, 
has much the contour of some of the subelongated species. I 
felt little doubt that it was a true Chemnitzia, and deposited 
it in that genus until our knowledge of the animal should 
determine its position. . 
It is a rare species: I possess three perfect specimens. 
The characteristic obtuse, yet reflexed apex, induced me to 
place it amongst its congeners of similar apical configuration, 
which is almost peculiar to the Pyramidellide. 1 believe that 
Tanthina is the only other genus that has something of a 
similar structure, but in it the apex presents rather a distorted 
irregularity than a true reflexion; but whether this be so or 
not, the connecting characters between Janthina and Chem- 
nitzia are of little value. 
Soon after the above description appeared in the ‘ Annals,’ 
I had to announce the unexpected discovery, which was so 
forlorn a hope that even the Gods would hardly have dared 
to promise its fulfilment, of perhaps one of the rarest of the 
British Gasteropodan undescribed molluscan animals; the 
cause has perhaps been its anomalous aspect. This rare 
creature was met with in the coralline zone of the South 
Devon coast, at Exmouth, in 13 fathoms water; it remained 
alive three days, and furnished me with the minutes which 
I now submit. 
Animal inhabiting an elongated, slender, hyper-hyaline 
shell of six rounded volutions, the body occupying half the axis, 
with a large patulous, sinuated, and a little outwardly reflected 
aperture, the peristome of which is entire. The animal rarely 
protrudes the eyes and tentacula. The tip only of the effete 
muzzle is seen, anda part of the foot, which is so short as 
almost to allow of progression within the aperture. The shell 
is of such hyaline purity as to give a full view of the organs, as 
if they were without that protection. The mantle is flake-white 
and even with the shell. The neck is very long, cylindrical, 
like that of the C. spirals, and finely transversely corrugated, 
