122 The Hijlory of ANIMALS. 
the whole cavity of the. (hell is divided into a multitude of cells, not more than a 
diird of an inch deep in general; the divifions are made by tranfverfe plates of the 
fame Dearly lheH that lines the mouth, and the pipe or liphuncle, the mouth of which 
is vifible in the bafe of the firft aperture of the fhell, is continued regularly, through all 
the cells, to the very extremity of the fhell. The cells are forty in number, and thev 
grow.gradually fmaller from the firft to the innermoft of all. 3 
c I' * S ^ oun< ^ ' n ^ lc Archipelago, and in the Eaftern Teas; and is very frequent in the 
foffile ftate in the clay pits and ftone quarries of moft parts of England, though not 
a native of our feas. This and other the like obfervations prove the vaft diftance to 
which creatures were carried from the places of their original refidence, at the time of 
the universal deluge ; the only period at which, and the only cataftrophe under which 
the fhells of the Eaft, and the ferns of America, which we find fo frequent in this 
ifland, could have been brought hither. 
Nautilus craffus apertura fubrotunda. 
"The thick Nautilus , with a roundijh aperture . 
This fpecies is, in the whole, of a rounded form, when entire, and rarely exceeds 
an inch and a half in diameter: the furface of the whole fhell is fmooth, and the 
opening of the mouth large, and approaching to round, but filled up in part behind, 
by the turn of the fpiral part of the fhell into it: the colour on the outfide is a pale 
tawny-brown, with lines of a darker brown on it: the infide is of the fame fine, 
pearly hue with that of the former: the mouth is open to a much greater depth in 
proportion, than that of the other kind; and at it’s bottom has an aperture, which 
runs through a multitude of cells, into which the inner cavity of the fhell is divided 
as in the other. 
This is a native of the Perfian gulf, and of fome other parts of the Eaft. 
Nautilus tenuis , auritus , dorfo denticulato . 
"The thin , aurited Nautilus y with a denticulated back . 
This is a moft extreamly elegant fpecies: it grows to eight or ten inches in diame¬ 
ter, and it’s fhell is fcarce thicker than a ftrong paper: the opening of the mouth is 
extreamly large, and is of a figure approaching to elliptic, but truncated at the hinder 
part, where the fpiral turn of the fhell enters it: the whole rim or verge of the mouth 
is undulated, and the hinder extremity of it is furnifhed with two appendages of fhell, 
called ears, one on each fide the turn of the fhell, which does not nearly fill up the 
fpace between them : the whole fhell is of a beautiful fnow-white, and it’s outer fur- 
face is beautifully marked with undulated ridges, with circular lines dividing them into 
fpaces, and with a multitude of tubercles: the back is formed all the way into a 
hollow, from the center of which there rifes a denticulated ridge. 
This fpecies is frequent in the feas about the Eaft Indies, and in fome parts of Ame¬ 
rica : our failors have fometimes the curiofity to pick them up, as they are in their 
boats, and the creatures fail by them ; thefe are ufually brought over entire to us; but 
what others we had, ufed to be greatly damaged, till of late, that fhells are become a 
regular part of commerce, and people are employed to colled them as carefully as any 
other article of trade. 
Nautilus tenuis , non auritus , dorfo fulcato . 
The furrowed-backed Nautilus , without ears . ® 
This is a very large and a very elegant fpecies; it is all over of a perfed fnow- 
white, and is not thicker than a piece of ftrong paper; it meafures often near a foot 
the largeft way, but it is thin, and, as it were, comprefled : the opening of the 
mouth is very large, but it is narrow, and there are no ears, but the corners of the 
hinder part of the mouth, between which the fpiral turn of the fhell enters the cavity, 
are high and fharp: the whole outer furface is elegantly ridged with rounded and un¬ 
dulated lines, with hollow fpaces between them : the back has a furrow hollowed all 
the way along it, and the ridges, which make it, are fharp and ferrated. 
» wttie, titfcit 
i!5auttius. 
i 
It 
