Chap, xvi 1 1 .] CEREBR UM A ND CEREBELLUM. 



155 



medulla, this part of the pons i.e., that composed of 

 horizontal fibres increases in thickness. 



204. Of the medulla there is a greater portion 



Fig. 91. Transverse Section through the Lower Corpus Quadrigeminum 

 and the Pons Varolii. 



a, AqscductuB sylvii ; 5. crossing of the brachia of the lower corp. Quadrip.: q, 

 ganglion of toe lower corp. quadri p.; i ,pedunculus of the lower corp. quadrlg.; 

 ba, tegmentura : 5, the descending root of the fifth ; p. bundles of tho 

 anterior pyramidal tracts in cross section ; trp, deep transverse bundles 

 of the pons; trs, superficial transverse bundles of the pons. (Mcynert. in 

 Strieker's Manual.) 



continued into the pons than of the cerebellum. 

 (1) There are the pyramidal tracts ; they do not lie on 

 the surface as in the medulla, but are hidden by some 



