RECONSTRUCTION OF H\TOBATES HOOLOCK 



453 



The dorsal cochlear nucleus is situated over the trianguhir nucleus of 

 the vestibular complex and is connected with the ventral cochlear nucleus 

 bv numerous strands of gray matter. The size of the cochlear nucleus is 



FIG. 215. LATERAL SURFACE OF GRAY ^LATTER OF BRAIN STEM, 

 HYLOBATES HOOLOCK. 

 Key to Diagr.-\m. dorsal cochlear, Dorsal Cochlear Nucleus; inf. coll., Inferior Colliculus; lat. gen. 

 BODY, Lateral Geniculate Body; nucl. of burdach. Nucleus of Burdach; nucl. of deiters, Nucleus of 

 Deiters; nucl. of coll. Nucleus of Goll; pontile. Pontile Nuclei; ret. form.. Reticular Formation; subst. 

 GEL. ROLANDO, Substantia Gelatinosa of Rolando; sup. coll., Superior Colliculus; ventral cochlear. 

 Ventral Cochlear Nucleus. 



commensurate with the relatively large size of the trapezoid body which 

 produces a marked excavation in the ventral surface of the metencephahc 

 reticular formation, separating this structure from the deep layer of the 

 pontile nucleus. 



The Sl'bstantla Nigra 



The substantia nigra is developed as a massive nuclear collection by a 

 specialization from the deep layer of the pontile nucleus. This deep layer 



