OF DENISON UNIVERSITY. gy 



Fig. 3. Similar section a few hundredths of a millimeter farther caudad. 

 Fig. 4, Portion of Fig. i, enlarged, x 165. 

 ^^'g^- 5-9- Portions of Fig. 2, enlarged, x 165. 

 Fig. 10. Portion of Fig. 4, enlarged, x 16^. 



PLATE IX. 

 C. L. Herrick. 



Fig. I. Transverse section through the anterior corpus (luadrigeminuin, al 

 the point of the 4th (oculo-motor) nerve. Ot. Optic tract fibres. As. Aqueduct 

 of Sylvius. Pp. Pes pedunculi. R^ Roots of nerve IV. 



Ftg. 2. Section somewhat farther back. R/>/i. Rajjhe. Z. Lemniscus 

 fibres. 



Ffg. 3. Section still further back, near the middle of the corpora (juadrige- 

 mina. 



Fio. 4. Section still farther back at the anterior margin of the pons. 



Fig. ^. Section at the caudad margin of corpus quadrigeminum anterior. 



Figs. 6-7. Transverse sections of corpus striatum in sections lying between 

 Fig. 6, and Fig. 7, of Plate I. More highly enlarged. 



PLATE X. 

 C. L. Herrick. 



Fig. I. Longitudinal vertical section through the corpora cjuadrigemina, 

 somewhat laterad from the ventricle. /;-. Tract from the posterior commissure. 

 IF. Root of the trochlearsis. //-, /F. Tract of the trochlearis near its nucleus, 

 n. IF. n. III. The principal portion of the nucleus of the oculo-motor. ///. 

 Root of the oculo-motor. Mb. Meynert's bundle Inferiorly, a portion of the 

 pons is shown, while superiorly, the nates and testes are cut nearly medianly. 



Fig. 2. Upper portion of the nucleus of the third nerve of the left sitle, 

 (VI .-15.) 



Fig. 3. Lower portion of nucleus of third nerve. 



Fig. 4. Nucleus of the trochlearis. 



Fig. 5. Median portion of the right hemisphere of Lcpus Syhti/i^us, to 

 indicate especially the position of hippocamjial commissure The section is 

 somewhat oblique, i. e., inclined from right ventral toward the left 



Fig. 6. Section of the medulla and cerebellum of the left side at the evil 

 of the root of the facialis and abducens. 



Fig. 7. Portion of transverse section of posterior median portion of hemi- 

 spheres of Blarina brevicauda. short-tailed shrew, especially f." th.- i.'latu.ns of 

 the hippocampus and corpus callosum. 



