VII 



MOLLUSGA—THE FOOT AND ITS GLANDS 



113 



Fig. 101.— Anatomy of Dent- 

 alliim entale, after Leuckart 

 (Wandtafein) and Lacaze-Du- 

 tMers. The riglit half of the 

 shell and the lower portion of 

 the raantle are removed. a, 

 Pallial nerve running up from 

 the visceral ganglion ; b, shell ; 

 c, space between the raantle and 

 shell ; d, anus ; e, visceral gan- 

 glion ; /, mantle cavity ; g, 

 mantle ; }i, lower, t, upper buccal 

 ganglion ; i, auditory organ ; k, 

 pedal ganglion, m, lateral folds 

 of the foot ; n, terminal pedal 

 cone ; o, filamentous tentacles ; 

 I, lower edge of the mantle; p, 

 leaf- like oral appendages; q, 

 snout; r, cerebral ganglion; s, 

 shell or columellar muscle, cut 

 through ; u, right nephridial (and 

 genital) aperture ; v, digestive 

 gland (liver) ; w, gonad ; x, upper 

 end of the columellar muscle ; y, 

 upper open end of the mantle. 



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