SECTION VIII. 171 



renders himfelf of more or lefs fpecific 

 gravity, to fink or fwim. 



Thefe opinions however are merely fpe- 

 culative, for I cannot find we Jiave ac- 

 quired an accurate hiftory of the animal^ 

 or its way of hfe. Rumphius indeed gives 

 fi figure and defcriptlon of the fifli ; but 

 I am of Breynius's opinion, that it is fo 

 confufed and unintelligible, as not any 

 information can be gathered from it. 



Plancus defcribes and figures fome very 

 minute recent Nautili from the fea fedi- 

 ment at Rimini. Gualtieri refigures three 

 fpecies of them, Tab. 19, A. B. C. They 

 are fo minute that three and thirty of them 

 hardly equal a grain in weight. Linnaeus 

 has'^ entered them among his Nautili. 



I have feen two remarkable fofiil kinds 

 yet undifcovered, living or recent fromiho 

 fea, viz, 



A Nau- 



