THE FOXS YAKOLII. 



519 



midal tracts of the medulla oblongata, and the superior or 

 deeper fibres with the lateral and posterior pyramidal tracts, 

 and with the olivary fasciculus. Besides these fibres from 

 the medulla oblongata, are others from the cerebellum and 



Fig. 145-* 



some of the latter as well as a part of the fibres derived 

 from the lateral tract of the medulla oblongata, decussate 

 across the middle line. 



* Fig. 145. Base of the brain (from Quain). \. I, superior longi- 

 tudinal fissure ; 2, 2', 2", anterior cerebral lobe ; 3, fissure of Sylvius, 

 between anterior and 4, 4', 4", middle cerebral lobe ; 5, 5', posterior 

 lobo ; 6, medulla oblongata ; the figure is in the right anterior pyra- 

 mid ; 7, 8, 9, 10, the cerebellum ; + , the inferior vermiform process. 

 The figures from I. to IX. are placed against the corresponding 

 cerebral nerves ; III. is placed on the right cms cerebri ; YI. and VII. 

 on the pons Yarolii ; X. the first cervical or suboccipital nerve. 



