XII 



PHYLUM MOLLUSCA 



713 



Fig. 626, aes.), following on the buccal cavity, is a narrow 

 straight tube, which runs between the halves of the liver towards 

 the aboral end of the body. It opens into a rounded thick- walled 

 stomach (st.), and, tdose to the pyloric aperture leading from the 



621. Sepia CUltrata, female ween from the posterior aspect, the wall of the mantle-cavity 

 divided along the middle line and the two flaps thus formed spread out so as to expose the 

 contents, ac. ni<I. accessory iiidamental glands ; an. anal aperture with its lateral appendages ; 

 /. membranous fold attaching the ctenidium to the wall of the mantle-cavity ; inf, external 

 opening of funnel ; inf. cart, infundibular cartilage ; ink .<t. ink-sac ; ink <1. ink-duct ; liy. liga- 

 mentous band which extends from the anterior wall of the mantle-cavity to the ovary, cut 

 across; liv. liver; 1. den. left ctenidium; I. neph. left nephridial aperture; I. nid. left 

 nidamental gland ; I. *t. g, left stellate ganglion ; -mant. curt, mantle cartilage ; mo. mouth; 

 HIM. neck muscles ; o<-. ovary ; odd. oviduct rect. rectum. 



latter into the intestine opens a wide ccccum (c.). The alimentary 

 canal at this point bends sharply round upon itself, and the in- 

 testine runs nearly parallel with the oesophagus to open into the 

 mantle-cavity as already described. 



A pair of glands (Fig. 624, s. g. ; Fig. 626, sal.), which are 



