NEW HELIX. 419 
and perhaps distinct from all known to our concho- 
logical authors. Its habitat was near Mevagissey 
in Cornwall, and when taken, was crawling on a 
stump ofa dead tree adjacent to a wood ; the locality 
altogether is very similar to our own woodlands, as 
indeed are numerous other portions of that inte- 
resting county,—so much the rival and counterpart 
of our own in appearance and productions. 
This elegant little helix when measured across 
its base, proves to be circular, being three tenths of 
an inch broad in all directions, and reaches to two 
tenths in its depth. ‘There are in the extreme, five 
whorls ; three and a half of these are very small, 
but from that point they are seen to increase in size 
remarkably, and are protuberant and round ; the 
increase is not however continued to the mouth, so 
that it leaves the diameter of the shell, as before said, 
the same in any measurement across its base. The 
minor whorls are strangely depressed, so much so, 
that when the shell is tilted on its edge and looked 
down upon, none are apparent beyond the margin 
of the last and large one, the whole however are 
divided by a distinct separating line. The base is 
rounded, the lip is found slightly reflected over the 
pillar cavity, by means of a narrow triangular or 
spear shaped fold, the umblicus itself small, but 
yet admitting a moderate sized pin, and a partial 
view of one whorl. The mouth is ample, scarcely 
thickened at its margin, nearly as deep as the body 
of the shell, and occupies one half of the diameter, 
but becomes contracted at the body whorl, the 
upper part of the lip here rather sloping downwards; 
the entrance is hardly narrowed by the body whorl, 
so that it isthus nearly circular. The animal was 
of a dark colour, and could withdraw itself far 
into its chamber. The shell is diaphanous, and 
of a greenish horn colour, crossed by distinct 
rounded striz, delicately thin, and covered some- 
3B2 
