\ msalsac 



',th. obl'Kiuas superior 



n.optu 



n. oculomotorius 

 n. tfiyemi/rus 



nn. facia lis; 

 etacusticiis 



rt. abducens 



nn.qlossopharijnaeus et vaaus 



Fig. 3 Dorsal aspect of the brain of Necturus showing relations of the nasal 

 sac. eye and ear and the course of the trochlear nerve. X 4.5 



169 



