nies.y. 



Figs. 12 to 16 A series of five transverse sections through the brain of Necturus 

 fixed in Formalin-Zenker's fluid and stained with carmine, to illustrate the form 

 relations in the cerebellar region. X 20. 



This brain was considerably flattened dorso-ventrally during preservation, 

 otherwise the relations are shown correctly. 



Fig. 12 Section through the anterior diverticuliun of the recessus lateralis 

 rhombencephali. 



Fig. 13 Section taken farther caudad, at the level where the massive dorsal 

 wall of the recessus lateralis begins to be replaced by the plexus chorioideus. 



Fig. 14 Section through the caudal end of the recessus lateralis including the 

 rostral ends of the area acustico-lateralis and eminentia trigemini. 



Fig. 15 Section at the level of the V roots and commissura cerebelli. 



Fig. 16 Section immediately rostrally of the VII roots, showing the relations 

 of the area acustica. 



Fig. 17 Transverse section through the right side of the cerebellum and me- 

 dulla oblongata of Necturus at a level slightly rostrad of figure 13, illustrating neur- 

 ones of the eminentia ventralis cerebelli. Golgi method. X 75. 



Fig. 18 Horizontal section through the body of the cerebelhmi of the left 

 side of the brain of Necturus, illustrating neurones of the cerebellum and teg- 

 mentum. Golgi method. X 75. 



24 



