Fig. 127.— Anatomy of Octopus (after Leuckart and Milne Edwards). The body is cut open posteriorly, the mantle laid 

 back to the right and left, and the liver remo\-eiL 1, Brachial artery ; 2, brachial nerve ; 3, pharynx ; 4, buccal ; 5, cerebral 

 ganglion ; 6, eft'erent duct of the upper salivary glands ; 7, funnel ; S, upper salivary glands ; 0, crop ; 10, anus ; 11, afferent 

 branchial vessel (branchial artery) ; 12, left renal aperture ; 13, efferent branchial vessel (branchial vein) ; 14, gastric ganglion ; 

 15, left auricle; 16, spiral caecum of the stomach; 17, renal sac; IS, water canal; 19, ventricle; 20, ovary; 21, rectum; 22, 

 efferent ducts of the digestive gland (liver), cut through near its opening into the intestine ; 23, mantle ; 24, stomach ; 25, 

 right ctenidium ; 26, aperture of the right oviduct ; 27, stellate ganglion ; 2S, nerve to the gastric ganglion ; 29, upper salivary 

 gland ; 30, aorta ; 31, oesophagus ; 32, optic ganglion ; 33, lower salivary glands. 



