Fig. 5 Anterodorsolateral view of a brain of Amphioxus (.transparent) , to 

 show the ventral territory of the neuropore in the adult. 



Fig. 6 Lateral view of the brain of Amphioxus, to show the roots of the septal 

 nerve, the ventricle with its olfactory, infundibular, and spinal prolongations. 



Fig. 7 Dorsolateral view of brain of Amphioxus, to show paired olfactory 

 nerves. 



Fig. 8 Ventral view of brain of Amphioxus to show the course of fibers of 

 terminal nerve. 



Fig. 9 Posterior ventrolateral view of Amphioxus brain, to show course of 

 fibers of terminal and septal nerves. 



Fig. 10 Anterolateral view of another brain, to show course of fibers of 

 terminal and septal nerves. 



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