4-46 



THE ANATOMY OF IXVERTEBRATED ANIMALS. 



Within the cavity of the mouth is an odontophore, with 

 its radula (Fig. 126, II.) ; and the long gullet passes back on 

 the middle line to open into the stomach, which is situated 



Fig. 12.5.— Diafrramraatic Section of a female yS'c/??^.—^', Buccal mass surrounded by 

 the lips, and showing the homy jaws and toni^ne; 6, oesophagus; c. salivary 

 eland; d. stomach: e. pyloric cjecnm ; g. the intestine ; h. the anns; «. the ink- 

 bag; A*, the place of the systemic heart; I. tlie liver; n. tlie hepatic duct of the 

 loft side; o, the ovary; p, the oviduct; g. one of the apertures by which the water- 

 chamhers are placed in comninnication with the exterior; r, one of the branchiae; 

 s, the principal ganglia agsregated round the oesopha<rns; f, the funnel; m. the 

 mantle; t^h, the internal shell, or cuttle-bone ; 1. 2. .S, 4. 5, the produced and modi- 

 fied margins of tlie foot, constituting the so-called arms of the Se^na. 



toward the middle, or the end, of the mantle-sac. From the 

 stomach, the intestine, more or less bent upon itself, passes 

 tow9»d the neural aspect of the body, and ends in the median 



