620 Journal of Comparative Neurology and Psychology. 



Fig. 18. V mdt 

 Figs. 16, 17, 18. Three camera sketches of transverse sections of the brain 

 of the embryo H. 19 tal^en between the levels of the sections shown in Fig. 14 

 A and B. Fig. 16 is just in front of Fig. 14 A, and Figs. 17 and 18 are 

 respectively five and ten sections farther forward. These sections show the 

 intimate relation of the mesencephalic bundle to the cerebellar fibers of the 

 trigeminus. 



