MOLLUSCA. 



187 



Kig. 177. — Argoxact, or Paper Nactii.ds. 



Of the eight-armed division, the most interesting species 

 is the Argonaut or Paper Nautilus, regarded as giving to 

 man the first example of the art of navigation. It has been 

 usually represented as in the annexed figure (Fig. 177), with 

 six arms extended over the sides of its little vessel to act as 

 oars, and two others upraised as sails. Such being the 

 universal belief among naturalists, it is to be expected that 



