i 2 8 The Hiflory of ANIMALS. 
Heated ; and mo ft of them are remarkable for the pearly fplendor of their 
Authors have called the greater part of the fpecies of this divifion Trochi . 
Cochlea conic a tuherculofa . 
The conic y tuberculofe Cochlea . 
3TSf)e TOUgit 
ICtothus* 
This is a large and very elegant fheli: it is often three inches in height, and two in 
breadth at the bafe : it’s form is pretty regularly conic; it’s mouth is moderately large : 
it confifts of about fix fpiral turns, and is terminated at the top by an obtufe end ~ It 
is elegantly befet with tubercles: they are large, broad at the bafe, and obtufe ' and 
are difpofed in five or fix feries, and the refit of the furface is undulated : the colour is 
a beautiful grey, variegated with blackifh. 
It is a native of the Eaft Indies; we have it in great abundance fometimes from China * 
the inner furface is of a fine pearly hue, and it is a common cuftom with our collectors of 
pretty fihells to have the outer coat of this taken off with acids 3 after which a little 
polifhing gives it the entire pearly appearance throughout. * 
Cochlea conica Icevis, 
The fmoothy conic Cochlea. 
This is a large fpecies ; we meet with it of three inches in height, and more than 
two in breath : it confifis of about feven diftinCl fpiral turns, and gradually becomes 
fmaller all the way from the bafe to the top, where it is terminated by an obtufe end : 
the mouth is moderately large, and is of a filvery white within, as is alfo the whole 
inner furface of the (hell: the outer furface is tolerably fmooth, and is of a whitifh 
colour, variegated with irregular rays of reddifh and brown. 
It is an Eaft Indian fheli, but we have it alfo from fome other places. 
Cochlea conica tranfuerfim radiata. 
The tranfverfely radiated conic Cochlea . 
This is about two inches in height, and an inch and a half in diameter at the bafe j it 
confifts of about feven fpiral turns ; the two loweft difproportionately large and flattifh, 
and the others very fmall; the extremity is an oblong, obtufe point: the whole fheli is 
of an elegant white, theoutfide approaching to the porcelain white, and the inner furface 
being perfectly pearly: there are a great number of tranfverfe ridges on all the parts of 
the fheli ; they are confiderably elevated above the reft of the furface, but they are not 
ridged, but rounded irregularly at the fummit. 
It is a native of China, and fome other parts of the Eaft. 
Cochlea conica fpinofa . %l)t flriCMp 
The prickly conic Cochlea . X?0Cl)tt3* 
This is one of the moft elegant of this genus. It is about two inches in height, and 
an inch and a quarter in diameter at the bafe : it confifts of about ten fpiral turns, but 
the four or five upper ones are very indiftinCt: the lower ones are large, and, round the 
edges of the three or four larger, there ftand regular feries of fharp and tolerably 
ftrong prickles: the furface of the lower part of the fheli is fomewhat irregularly 
railed into a few tranfverfe ridges, and has many fine lines running principally in pairs 
in the courfe of the volutions: the outfide is of a beautiful chefnut brown ; the fpines 
paler, and the lines darker than the reft. 
It is a native of the Eaft Indies: we have it principally from China. 
Cochlea depreffta leevis. 30 )t 
The fmoothy deprejfed Cochlea. ;Spf!c!lL 
This is an elegant fpecies, but of an extreamly different form from ail the precede- 
ing; they are all elevated into a conic figure;'on the contrary, this is depreffed and 
flat, and the extremity of the clavicle, is funk within the reft of the furface. It is 
of an orbiculated figure, and about two inches in breadth, and half an inch thick: 
• it’s 
