/ ' masai sac 



m. red as inferior' 

 m. rectus lateralis'' 



nventralis aoculo motor U 



saccus vasculosus 

 hupophusls 



n.trlaeminus 



Fig. 4 Ventral aspect of the brain of Necturus showing relations of the nasal 



sac, eye an 

 X4.5. 



d ear and the course of the optic, oculomotor and abducent nerves. 

 170 



