15 



'^i 



Fig. 1(31. 



a 



Fig. 159.— Alimentary canal of Murex trun- 

 ClllUS (after B^la Haller). 1, Pharynx ; 2, ducts of 

 the .salivary glands (5) ; 3, fesophagus ; 4, (i, and 7, 

 glands of tlie fore-gut (S) ; 9, digestive gland (liver) ; 

 10, stomach ; 11, hind-gut; 12, gland of the hind- 

 gut ; 13, anus. 



Fig. 160.— Alimentary canal of Sepia. 1, Jaw ; 

 2, pharynx ; 3, posterior buccal ganglion ; 4, duct 

 of the salivary gland (5) ; 6, digestive gland (liver) ; 



7, anus; 8, rectum; 9, efferent duct of the pigment glaud (ink-bag), 10; 11, stomachal coecuni ; 12, 

 stomach ; 13, ganglion gastricum ; 14, " pancreatic appendages " of the gall ducts of the digestive gland. 



Fig. 161.— Sketch of the anatomy of Limacina helicina, from the right side, after removal of the 

 mantle, heart, and kidney (after Pelseneer). 1, Fin (parapodium) ; 2, foot ; 3, central nervous system 

 (oesophageal ring) ; 4, oisopliagus ; 5, anus ; 6, columellar muscle ; 7, duct of the hermaphrodite gland, 

 7a ; 8, intestine ; 9 and 10, dental plates of the stomach ; 11, accessory glands of the genital apparatus ; 

 12, mantle cavity ; 13, seminal groove or furrow. 



