82 



COMPAEATIVE ANATOMY 



CHAP. 



Fig. vs.— Pallial complex and siphon of Nautilus pompilius 9 (sifter Bourne and Lankester). 



V, Valve of the siplion ; ro, right genital aperture ; hi, the mantle fold, with tlie nidamental gland, 

 folded back ; an, anus ; cp, left aperture of the secondary coelom ; Ihn, left upper nephridial aper- 

 ture ; Zo, aperture of the left rudimentary oviduct ; h'li, left lower nephridial aperture. The four 

 ctenidia are not lettered. 



arv ui3c| 



Fig. 79.— Pallial complex of Nautilus pompilius i (after Bourne and Lankester). pc, Penis ; 

 a, muscle band of the siphon ; Isii, aperture of the left rudimentary seminal duct ; ntplia, neplip, 

 lower and upper nephridial aperture of the left side ; olf, left ospliradium ; viscper, left aperture of 

 the secondary coelom ; an, anus ; x, supra-anal papilla of unknown significance ; c, mantle cut oil'. 



