80 
XLIII. Turritella. A turreted univalve shell ; the opening entire, 
and rounded ; with the margins disjoined in the upper part ; and a 
groove in the right lip. 
As it appeared to be necessary to separate the genus Vis from 
JBuccinum, in consequence of the turriculated shape of the former 
shells, so it is necessary to separate Turritella from Turbo, Cyclos- 
toma, Pupa, and Scalaria ; the shells of the genus Turritella having 
all a notch at the right side of their opening, which is not the case 
with any shell of the other four genera. 
Turritellites perforatus, Lam. Plate Y. Fig. 12, is a very curious 
species of this genus, the columella being perforated through the 
whole axis of the shell. This peculiarity exists in the shell here 
figured ; but it does not exactly agree with that which is described 
by Lamarck ; since its turns are smooth, while those of the shell 
which he describes have three or four transverse strife. The differ- 
ence may be only that of a variety ; or the surface, in my specimen, 
may be somewhat altered by decomposition or friction. 
In a large fossil shell of this genus, now before me, a very curious 
circumstance is observable. The shell has been completely fractured 
across, and afterwards united by that astonishing power of reparation 
which is perhaps possessed by all shell-fish. 
Some species of this genus are found in Hampshire, particularly 
T. terehellata, Lam. Turbo terebra, Brand. T. imbricataria, Lam. 
and Turbo editus, Brand. This latter shell has been found, very fine, 
in the neighbourhood of Selsea, with several other of the same shells 
as are found in Hordwell Cliff, by Mr. J. Holloway, of Portsmouth. 
This gentleman, to whom I am obliged for this information, and for 
several of these specimens, relates that he also found this shell, with 
others which I shall have occasion to notice, in a blue mud at the base 
of Stublington Cliff, between Stoke’s Bay and Southampton. 
Among the pyritical shells of the Isle of Portland are frequently 
found shells of this genus. Impressions of shells of this genus, as well 
