CEPHALOPODA. 



433 



The oesophagus (Oe), with or without a crop-like dilatation, is 

 long and ends behind in the stomach (M), which is provided with 

 a large, often spiral, caecum (M'). The intestine leaves the stomach 

 close to the oesophageal entrance, and passes as a straight or^slightly 

 coiled tube (Nautilus, Octopus) to the anus (A). 



FIG. 348. Male Nautilus, ventral view ; the mantle is draAvn back ; reduced, after Keferstein 

 (from Pelseneer). a eye ; ft genital opening ; c opening of the anterior kidney ; d inter- 

 branchial papilla ; e opening of the posterior kidney; /edge of mantle ; g postanal papilla ; 

 h external opening of the pericardium ; i posterior gill ; j anus ; k anterior gill ; I funnel ; 

 m tentaculiferous appendages. 



The liver (L) is a compact gland, and consists of two lobes, more 

 or less united, one on each side of the oesophagus. The bile ducts 

 (G-g) are two in number and covered by a glandular tissue called 

 pancreatic, but really renal (see below) ; they open into the caecum 

 of the stomach. 



2 F 



