A Cephalopodons Mollusk. 



nerves which pass to the arms. The siphonal nerves are 

 given off from the lower portion of the infra-cesophageal 

 mass, while the pleural. and visceral nerves arise more 

 posteriorly. 



From the smaller supra-cesophageal ganglion a pair of 

 very minute connectives extend to the posterior surface 

 of the buccal-mass, where they end, immediately over the 

 oesophagus, in a pair of small supra-buccal ganglia. From 

 the supra-buccal ganglia fibres extend around the oesophagus 

 to the infra-buccal ganglia. The latter are of about the 

 same size as the supra-buccal pair, and are united below the 

 oesophagus by a commissure. 



Make drawings of the ventral, lateral, and dorsal views of 

 the brain. 



