Briiili tolijr inl . 



- DiTiiss. rollic. inl. 

 . Nr. rollir itil. 



St S VII 



A 



.15 



Ni- nird. N. vesl 



Fig. 3 Posterior aspect of a wax-plate reconstruction of the cochlear appa- 

 ratus of the opossum brain. Enlarged 5 diameters. A, fibers passing from the 

 superior end of the nucleus lemnisci lateralis to the median line (see B in fig. 2); 

 B, opening through which passes the main mass of the corpus restiforme; Corp. 

 reslif. indicates the region in which the cochlear root is pierced by strands of the 

 corpus restiforme. 



Fig. 4 Dorsal aspect of a wax-plate recoTistruction of the left vestibular 

 complex of the opossum brain. Enlarged 5 diameters. AA, fibers passing from 

 the medial nucleus cerebralward towards a nuclear mass in the central grey sub- 

 stance; B, fibers forming a decussation with similar ones from the superior ves- 

 tibular nucleus of the opposite side; C, cut surface where a piece of the nucleo- 

 ccrebellar tract has been removed to expose Deiter's nucleus; D, decussation of 

 vestibular fibers from the nucleo-cerebellar tract and the nucleus fastigii; E, 

 opening through which pass the fibers of tlie olivo-cochlear tract or dorsal path 

 of the cochlear system. 



43S 



