CEPHALOPODS. 30/> 



the nerves that move them, and the vascular 

 system that animates them. 



This singular Class, which Cuvier denominated 

 Cephalopods, or having their feet attached to 

 their head, appears to follow very naturally the 

 Trachelipods and Heteropods, lately described, 

 which have not only eyes furnished with iris 

 and pupil, but also distinct sexes, and are of pre- 

 daceous habits, all characters which they possess 

 in common with the Cephalopoda or Cuttle-fish. 

 There is, however, an animal amongst the naked 

 Gastropods called by the ancients, from its ten- 

 tacles representing the ears of a hare, the sea- 

 hare, 1 a name it still bears in Italy, which 

 Linne named JLaplysia, in which he was followed 

 by Lamarck, but modern writers after Gmelin 

 have called it Aplysia, a name used by Aristotle 

 for a very different animal, a kind of sponge, 2 

 and, therefore, improperly applied this animal 

 has many characters that are found in some of 

 the Cephalopods, particularly in its circulating 

 and nervous systems ; in having internal solid 

 parts, and in discolouring the water with an inky 

 fluid, so that there seems also a connection 

 between this genus and the Cephalopods amount- 

 ing to something more than a mere analogical 

 resemblance. 



Mr. Owen has divided this Class into two 



1 Lepus marinus, Plin. " Hist. An. 1. v. c. 16. 



VOL. I. X 



