AND PERSONALITY 



Ctrcumoesophageal strand 



Suboesophageal 

 ganglion 



Thoracic 



ganglion 



First abdominal 

 ganglion 



Dorso- ventral 

 artery 



Dorsal nerve 

 fibre 



Sixth abdominal 

 ganglion 



FIG. 19. The nervous system of the crustacean (marine crayfish). 



189 



