VII 



MOLLUSGA—THE PALLIAL COMPLEX 



83 



Fig. 80.— Sepia Savignyana, from behind (after Savigny). The ^'reater part of the mantle cut 

 open and laid back on the right side (left in the figure), a, Prehensile tentacle ; &, oral arm ; c, 

 mouth with jaws ; d, lower aperture of siphon ; e, eye ; /, locking apparatus of the mantle g ; Tt, right 

 ctenidium ; i, siphon ; Ic, locking apparatus of the mantle on the visceral dome ; I, upper aperture 

 of siphon ; m, anus ; n, depressor infundibuli ; o, penis ; p, right nephridial aperture ; g, posterior 

 integument of the visceral dome ; r, fin. 



