I 21 
*The Hijlory of ANIMALS, 
face is farrowed, with eight deep longitudinal lines arranged in pairs, with a vacant 
fpace between them: the ridges are rounded, and there are two broad, annular marks 
lurrounding the fhell toward the bafe, and one other much narrower toward the 
point: the°colour of the whole fhell is a dufky grey, and it’s furface not at all glofly. 
It is found on the fhores of Italy and elfewhere; and is very frequent, alfo, foffile, 
in the mountains of Sardinia. 
. * % * i '* *, 
Dentalium conicum utrinque apertum. %\yt great 
7 he conic Dentalium, open at each end. 
This is fix or feven inches in length, and three quarters of an inch in diameter near the 
mouth : the opening of which is rendered hill larger, by a kind of irregular lip which 
extends it to an inch and half in breadth; from this extremity to the other it dimi- 
nifhes all the way in thicknefs ; and the oppofite end is hardly more than equal to a 
goofe-quill, and is open : the whole furface is of a dufky brown, and there are about 
twelve circular or annular ridges on it; they are not much elevated above the reft of the 
furface, and thofe toward the ends are lefs fo than the others. 
It is frequent in the German ocean, and is wafhed on fhore in many places in fuf- 
ficient abundance, but is feldom found entire, being a thin and brittle (hell, eafily 
broken by ftriking againft others: when perfedt, the larger extremity is not found 
wide open as in the others, but has an obtufely conic body placed in it, pierced with 
a great number of fmall apertures. By long lying on the fhores it becomes white, and 
is very rarely found with this part remaining on it. 
The other fpecies of the Dentalium are, i. The fubcylindric, fmooth, oblique, and 
thin Dentalium, called the Dentalium of the fhops by many. 2. The irregularly 
cylindric, flexuous, and contorted Dentalium, found on other fhells and corals, 3. The 
cylindric and varioufly contorted Dentalium, found in wood immerfed in fea-water. 
4. The large, ftriated, conic Dentalium. 5. The large, fmooth Dentalium. 6. The 
ftraight, conic Dentalium. 7. The long and flender, fmooth Dentalium. 8. The 
fhort, fmooth, open Dentalium. 
NAUTILUS. 
T HE Nautilus is a fimple fhell, having no hinge, formed of one continued 
piece, rolled, as it were, into a fpiral form, and having it’s cavity divided into 
a great number of cells, by tranfverfe partitions, each of which has a perforation, and 
is continuous to the others, by means of a fiphunculus carried the whole length of the 
fhell. 
The animal inhabiting this curioufly formed fhell is a Sepia. 
Of the Nautili, fome are thick and ftrong, others thin, light, and brittle; fome are 
aurited, others are not fo; and fome are fmooth on the external furface, and others 
furrowfed. 
Nautilus crajfus apertura oblongo-ovata . „ 
The thick Nautilus , with the aperture of CtittllllOtt, 
«« oblong, oval figure. $tClt ^ttttlUS. 
This is a beautiful fhell, and grows to a very confiderable fize, often meafuring 
ten or twelve inches the long way, when we meet with it entire; but the lip is thin* 
and very liable to be chipped and broken, and moft of thefe brought to us have met 
with more or lefs of this kind of mifchief: when entire, the lip ftands very high, and 
the opening of the mouth is large, and of an oval, oblong figure; from this part there 
runs a kind of tail, which turns within the hinder part of the opening of the mouth, 
and is continued in a fpiral form for feveral circumvolutions, but within the body of 
the fhell, and therefore not vifible, but by cutting it vertically open : the fhell is com* 
fiderably thick, heavy, and firm ; it’s outfide is of a brownifh hue, variegated with a 
paler colour : the infide is of the moft beautiful mother of pearl colour imaginable: 
the opening of the mouth does not go deep into the fhell, but in it’s hinder part there 
is a hole, which is the firft opening of the fiphuncle of the inner part: from this place 
I i the 
