160 Cincinnati Society of Natural History. 



Fig. 6. — Cells from the basi-lateral part of the axial lobe of the 

 cerebrum. See Plate X., Fig. i. 



Fig. 7. — Central portion of section figured at Fig. 2 of this plate, 

 showing giant cells and fibres. 



Fig. 8. — Lateral portion of same section in tectum opticum, with 

 a single sporadic giant cell. 



Plate XIII. 



A series of sections through the medulla and details. 



Fig. 1. — Section at the origin of the eighth nerve, its nucleus at a. 



Fig. 2. — Section near the exit of the ninth nerve. 



Fig. 3. — Section of the root of the ninth and tenth. Compare Fig. 7, 

 Plate X., for structure of nucleus. 



Fig. 4. — Section at the exit of the twelfth, c. c, canalis centralis; 

 n. XII., nucleus of twelfth nerve (see Fig. 10 for details); 

 n. XI., nucleus of the spinal accessory, which emerges from 

 the lateral groove near the letter a. 



-A section somewhat further back with same structure. 



-A similar section near the anterior roots of the cord. 



-Nucleus of the hypoglossal nerve. 



-Portion of Fig. 2 enlarged. 



-Portion of section through nuclei of the third nerve. 



-Nucleus of hypoglossal nerve. 



Plate XIV. 



A series of horizontal sections of the medulla. 



Fig. 1. — Section at the level of the lower fibres of the fifth nerve. 

 a, b, c, external, intermediate and medio-basal longitudi- 

 nal bundles; x, fibres of the girdle bundles; 0., olive; n. v s., 

 supposed sensory nucleus of the fifth nerve ; n. v. m., motor 

 nucleus of same ; n. A, corpus posterius. 



Fig. 2. — Similar section at a higher level. 



Figs. 3, 4, 5. — Similar sections at successively higher levels. 

 n. VIII. a, chief nucleus of the auditory nerve; VIII. b r 

 second nucleus of the auditory; cf. , Figs. 6, 7. 



Fig. 



5- 



Fig. 



6. 



Fig. 



7- 



Fig. 



8. 



Fig. 



9-- 



Fig. 



10. 



