water from the {hell, in order that it may fwim the more 

 readily ; then throwing back the two foremoft arms, it 

 difplays between them a membrane of wonderful te- 

 nuity, which acts as a fail, while with the remaining 

 arms it rows itfelf along ; the tail in the middle afting 

 as a helm to direcl: its courfe ; and thus purfues its voy- 

 age like a little (hip ; and if alarmed by any appea- 

 rance of danger, takes in the water and defcends." 



We muft be careful not to confound this (hell, which 

 is the real and proper Nautilus, with the chambered 

 or pearly Nautilus, which belongs to a very diftindt 

 genus. The Argonauta Argo is found of various fizes, 

 from one to fix or eight inches in length, or even 

 larger. It is a native both of the Mediterranean and 

 Indian feas. 



