[ 8 °9 ] 
in the teftaceous kingdom, we are convinced of that : 
but let us, for argument fake, fuppofe, that many 
never would have had a nucleus, that ftill does not 
hinder, but that the body itfelf might be formed by 
a polype, only of a different fpecies from thofe, that 
have the nucleus. And after all, if it fhould yet be 
objected, that the animal, though ever fo fmall, 
would retain the exadt fhape of what it would be in 
future, let them have recourfe to the fine collection 
of (hells of my good friend 'Mr. Arthur Pond, 
F. R. S. where they may trace many families of 
ihells from their minute lfate, and fee the regufar 
progrefiions of the animal, till it has attained full 
growth; by which it will appear, that the refemblance 
is often very fmall between their firft and laft Rate. 
The country of the belemnitae is unknown to us'; 
but there is great probability it is the fame with that 
of the conchre anomias in general, and ammonitas ; 
fince they are ufually found together, and are well 
fuppofed to be the inhabitants of deep or unknown 
lbas, beyond human reach. 
And now, Sir, having had fo frequent occafion to 
mention the orthoceratitse in the courfe of this fub- 
jedt, they being here rare and uncommon foflils, I 
have given the figures of fome few fpecies of them, 
which perhaps may not be unacceptable, N° 2, 3, 
4, y, and 12. 
If it fhould be afked, whether they proceed like- 
wife from a belemnites ? I anfwer, that I fuppofe them 
to proceed from a polype like the reft, but whether 
their parent polype formed itfelf a belemnites- like 
chryfalis or habitation (being a ftouter animal), is 
more than I can affirm, although very probable, 
as the terminating point in them is as fharp and fine 
f K as 
