[ 8io ] 
as the nucleus of the belemnites; and it is obferved, 
that all the turbinated fhells increale their circum- 
volutions from the point, or apex ; but that is not 
the immediate buhnefs of the prefent purpofe, as 
nature has many ways to.compafs her ends. My de- 
lign will be anfwered, if it fhall only be thought, that 
I have evinced the belemnites to be an animal pro- 
duction, formed by a polype, as other coralline bo- 
dies ; and its nucleus to be a concamerated teftaceous 
body, of the nautili genus, proceeding therefrom. 
Such is my hypothecs of this hitherto not fuffi- 
ciently explained body ; which I candidly fubmit to 
better judgments, to approve or rejeCt, as reafon fhali 
appear. I am, with perfeCt regard, 
SIR, 
London, Nov. Your molt obedient humble fervant, 
14, 1754. 
Guftavus Brander. 
_ t 
Defcription of ^rPLATE. 
N® 1. A feCtion of a common nautilus. 
2, 3, f, and 12. Sections of orthoceratitas. 
4. An orthoceratites intire. 
6. A feCtion of a belemnites, with the nucleus. 
7. Ditto, without the nucleus. 
8. An oblique feCtion of a belemnites, to fliew 
the inward itruCture. 
9. A belemnites without a cavity, only a fmall 
perforation. 
3 0. A nucleus of a belemnites. 
1 1 . A belemnites, with a very fmall cavity. 
CXVIL 
