434 JOHN H. STOKES 



12. The superior nucleus is poorly defined and differentiated 

 with difficulty from surrounding stjructures, namely the nuclei of 

 the base of the cerebellum above, and the sensory nucleus of the 

 fifth nerve below and anteriorly. 



13. The decussation between fibers from the two Bechterew's 

 nuclei occurs in association with a decussation of fibers apparently 

 from the sensory nucleus of the fifth nerve, rather than with the 

 brachium conjunctivum. 



14. The nucleus lateralis N. vestibularis (Deiter's) presents a 

 medial and a lateral portion, separated by strands of the vestibular 

 spinal tract, but characteristic Deiter's cells are found among the 

 strands, showing the two parts to be essentially one nucleus. 



15. So far as these preparations indicate, there is no nucleus 

 intercalatus separate and distinct from the nucleus medialis N. 

 vestibularis. 



16. A band of fine fibers passing cerebralward from the medial 

 vestibular nucleus along the floor and wall of the ventricle, medial 

 to the olivo-cochlear tract, apparently connects this nucleus with 

 a ganglion mass in the central grey substance in the floor of the 

 ventricle anterior and medial to the superior vestibular nucleus. 



17. A connection apparently exists between the spinal vestibu- 

 lar nucleus and the seventh nerve nucleus. 



18. The strands of the nucleo-cerebellar tract are distributed 

 to the large nuclear mass in the base of the cerebellum that 

 apparently corresponds to the nucleus fastigii of the human brain. 

 Decussation of these fibers takes place in the roof of the ventricle, 

 and is easily distinguished from the' decussation of the corpus 

 restiforme. 



The writer desires that the concluding paragraph of this paper 

 shall be an expression of his sense of obligation to Professor 

 Streeter, at whose suggestion this work was undertaken, and who 

 with generous cooperation has made his own and the laboratory's 

 resources freely accessible for its advancement. 



