2 7 6 NATURAL HISTORY 
beft, we cannot boaft of the rich colourings which the (hells o' the 
Mediterranean and Indian fhores afford the col ledtions of the curious. 
Some however we have too rare and beautiful to be palled over 
in ftlence ; thofe moft worthy or notice, which have fallen m the 
way of my obfervation, are the following : 
Plate xxviii. Fig. i. Of the univalve kind, we have the blue-raved 
limpet, or the oval pellucid limpet, dotted with blue lines length- 
ways from the vertex to the margin ; Patella minima , leevis, ova, 
pellucida ceeruleis a quatuor ad novem lineohs eleg antijjime infigmta. 
From Falmouth Harbour and the Land’s-End. 
ii. The radiated beaked limpet with an oval apex ; Patella ra- 
diata , injlato apice pujlulato & albejcente. From Whitfand Bay. 
hi. Rough-ridged limpet ; Patella Jlriis rugofis , afpera , apice 
acuminato. Mount’s-Bay. 
iv. The fool’s-cap, of a pale bloflbm-colour, rarely found on 
the Englifh fhores ; when taken up with the animal in it, there is 
a membrane at its margin by which it adheres to the (abject it 
chufes to fettle on. From the Land’s-End and Heyl Mouth. Pa- 
tella rugofa , alba , vertice admodum adunco. 
v. Smooth tooth-fhell, the cafe of a fea-worm ; Dent ale Leve, 
curvum , album. Land’s-End. 
vi. The wavy ftriated trochus, pearl-coloured ; Trochus acumi- 
natus , crebris Jlriis tranfverje et undatim dijpojitis donatus. Gwy- 
thien fands. 
vii. The pearl-coloured, ffriated, papillaceous top-fhell ; Trochus 
planior , creberrimis flriis Jplendidis papillaceis donatus. Ibid. 
The Nautilus is very rare in Cornwall, and the V Put a of the 
fpecimen which I have, not three quarters of an inch diameter. 
The white ruddy-fpotted fnail with a circular mouth , Cochlea 
alba , Lu?iaris , rufefcens fafciis maculatis diJlinEla. Ibid. 
The fmooth flat-twirled river-fnail ; Cochlea J'emilunaris , l<zvis> 
Jpird una tantum maculatd diJlinEla. Ibid. 
viii. The cornu-ammonis fnail ; Cochlea cornu- ammonis . 
ix. The high ftriated white cochlea, or baftard ventle-trap ; 
Cochlea alba , Jlriis raris admodum e7ni?ientibus exaj'perata. From 
the Land’s-End. 
N. B. The famous ventle-trap, fold lately at London for eigh- 
teen guineas, was a fpecies of this kind but larger, and the 
parts lefs connected with the body. 
x. The yellow canulated whelke with black furrows ; Turbo s 
luteuSy J'eptem fulcis parallels nigris dijlinclus. Land s-End. 
The fniall red and white variegated whelke ; Turbo minimus , 
leevis, variegatus , albo-rubicundus . Whitfand Bay. 
s Or Turben. 
The 
