( 40 ) 



Regarding llie course of the mid-brain root I may be short. In all 

 mammals it runs distally, laterally to the uncrossed nervus trochlearis ; 



•'•/::• JT/ 



Fis. 22. Mus rattus. 



Fis. 23. Phoca vitulina. 



only in carnivora (cat) and chiroptera (bat) does it run medially to it" 

 in "many rodents the trochlearis runs between the V cells and the 



