90 BULLETIN OF THE LABORATORIES. 



PLATE XIV. 

 W. G. Tight. 



Fig. I. A transverse section of medulla at the tirst appearance of the decus- 

 sation. 



a. Entrance of small bundle of Xlth nerve root. 



d. Nucleus of ventral cornu. 



c. Nucleus of dorsal cornu cervix, elevated. 



d. Median nucleus. 



e. Commencement of ventro-dorsal lateral nucleus. 



■Fig. 2. Magnified section of the olivary body a, as seen in Fig. 6, Plate 

 XIV, a. 



^^S"- 3' Magnified view of a portion of c, Y\g. 5, Plate XIV. 



Fig. 4. Magnified view of e. Fig. 6, Plate XIV. 



Fig. 5. Cross section of medulla at the decussation, just caudad to the oliv- 

 ary body. 



a. Decussation. 



d. Median nucleus. 



c. Ventro-dorsal lateral nucleus. 

 (i. Funiculus gracilis. 



Fig. 6. Cros^ section of the medulla at the central part of the deccussation. 



a. Olivary body. 



i. Ventro-dorsal lateral nucleus. 



<:. Decussation. 



d. Ventral portion of the median nucleus, nucleus of the Xllth nerve. 



e. Dorsal portion of the median nucleus, nucleus of Xlth nerve. 



f. Funiculus gracilis. 



PLATE XV. 

 W. G. Tight. 



Fig. I. Cross section of medulla at the entrance of the Xllth nerve root. 

 a. Nucleus of Xth. 

 ^. Nucleus of Xllth. 



c. Cuneate nucleus. 



d. Portion of the formatio reticularis. 



e. Nucleus of the raphe. 



/. Entrance of the Xllth nerve root. 



g. Olivary body. 



//. Tubercle of Rolando. 



/. Nucleus laterale. 



k. [pyramid 



/. Restifoi m tract. 



Fig. 2. Magnified view of Fig. i, a, nucleus of Xth nerve. 



Fig. 3. Magnified view of Fig. i, f, raphe. 



