The Hijlory ^ANIMALS* 1^3 
It is found in the Eaftern feas, and in fome of the warmer parts of Europe ; in fine 
weather there are vafl numbers of them feen together, failing about on the furface of 
the water, near the fhores. 
Nautilus tenuis , non auritus, dorfo fulcato et undulato . 
The thin Nautilus without ears , and with a fulcated and undulated backk 
This is a fmaller fpecies than the former, but it is a very beautiful one $ it meafures 
about five inches the longeft way, and is between three and four in depth, but it is very 
thin, and, as it were, comprefled: the opening of the mouth is very long, but it is 
narrow, and it has no ears, nor even the {harp corners of the former fpecies ; the co¬ 
lour is a yellowifih-white, and the fubftance very thin and delicate 5 the whole furface 
is ridged in a tranfverfe, undulated manner : the back is furrowed and undulated, and 
the two ridges of it are railed into broad and obtufe denticulations. 
This fpecies is fometimes found about the fhores of the American iflands, but 
The other fpecies of Nautilus known recent at this time are, 1. The little papyra¬ 
ceous Nautilus, with a ridged back. 2. The little, thick Nautilus, with an oval 
mouth. 3. The little, umbilicated Nautilus, with furrowed fides. 4. The aurited, 
thin Nautilus, with a broad mouth. 5. The prickly, aurited, thin Nautilus. 6* The 
thin Nautilus, with ferrated prickles. 
Thefe are all that have been found recent in our feas, but we have many other fpe¬ 
cies preferved in the fofiile world, which probably are, at this time, the inhabitants of 
the deep feas, whence no accident ever brings them on fhore: of thefe kinds are the 
Nautilus armatus, or mailed Nautilus j and the great, thick Nautili of our {lone 
quarries, which differ from the common thick Nautilus: all the fpecies of the cornua 
Ammonis alfo belong to this genus; as do alfo the orthoceratitse, and the other conca- 
merated fhells found fofiile, and figured and defcribed in the former volume of this 
work : fome of thefe are quite ftraight, and of a conic form; others have their ends 
more or lefs fpirally twilled 5 but all of them have their cavities divided in this manner 
into many cells, with a fiphuncle. 
COCHLEA. 
T H E Cochlea is a fimple fhell, having no hinge, formed of one fingle piece, of 
a fpiral form, and containing only one cell, or having it's whole inner cavity 
undivided : it is of an umbilicated form. 
The fpecies of this genus are very numerous, and have certain diftin&ions, accord¬ 
ing to which they may be conveniently arranged under feveral divifions: the clavicle 
in fome is depreffed, in others it is elevated; in fome the furface is fmooth, in others 
it is floated; in fome it is rough, and in others tuberculofe, furrowed, or jagged : thefe 
are, however, lefs regular marks of diflindion, than are difcoverable in the opening 
or mouth; this, 1. in fome is quite round, or nearly fo 5 2. in others it is femicircular, 
or femioval, being truncated, as it were, or otherwife terminated by a flraight ridge 
behind ; and, 3. in others it is depreffed, or formed of a femicircle, crufhed together, 
as it were, or in part filled up by one of the turns of the fhell entering into it. 
i. Cochleae, with round, or nearly round openings or mouths. 
Cochlea elata tuberculofa ore rotundo aureo. 
The tally tuberculofe Cochlea , with a rounds yellow 
mouth . 
This is a very elegant fhell ; it grows to about two inches in height, and an inch 
and a half in diameter: the thickefl part is toward the middle; from thence it grows 
a little fmaller one way to the mouth, and gradually tapers the other way to a point at 
the extremity : it’s furface is deeply furrowed with circular or fpiral lines, which 
feem plicated, and are fomewhat irregular, and there are a great number of tubercles 
on it, difpofed regularly in five feries; they are moderately large, and are obtufe at the 
extremity : the furface is variegated with a deep brown, and a paler colour j the extre¬ 
mities of the tubercles are palefl j there is much variation in the external colour, but 
the 
