84 BULLETIN OF THE LABORATORIES 



Figs. 5-7. Similar sections at successively higher levels as far as to the 

 corpus callosum. 



Fig. 8. Transverse section through the corpus callosum and anterior com- 

 missure. 



Fig. 9. Section of part of fornix body. 



Fig. 10. (III(r-i3.) Horizontal longitudinal section through the middle of 

 the right hemisphere, passing through the corpus callosum and the hippocampal 

 involution. 



PLATE III. 



C. L. Herrick. 



Details from sections of preeeeding plates. 



Fig. I. Portion of corpus striatum, x 25. 



Fig. 2. Cortex near olfactory tract in transverse section at cephalic margin 

 of corpus callosum. 



F'ig. 3. Portion of cortex near middle of median fissure in transverse sec- 

 tion, half way from front to corpus callosum, x 165. The arrow indicates the 

 direction of the surface. Two sorts of cells, centrifugal preponderating. 



Fig. ^. Typical motor area. (¥1^-24^') Giant or ganglion celllayer near 

 median fissure. (Compare Fig. 7.) x 165. 



Fig^ 5. Similar motor area in Yla-J, in front of the corpus callosum, in 

 about the middle of the superior surface. Only the upper layers, x 165. 



Fig. 6. Deep layer of cortex of median fissure near the lower third of ver" 

 tical diameter, x 165. 



Fig. 7. Section entirely through the cortex of VIa-24, at same point as 

 Fig.;. x86. 



PLATE IV. 

 C. L. Herrick. 



Fig. I. Transverse section through the hemisphere near the middle of the 

 corpus callossum, showing the position of the fornix body and descending tract 

 of the fornix. Also the relations of the corpus striatum and optic tracts. 



Fig. 2. Transverse section through the thalamus, to show the relation of 

 the hippocampus, its commissure and the rearrangement of the white matter in 

 the thalamus. A small fragment of the corpus striatum remains. 



Fig. 3 Portion of a, Fig. 2, enlarged. Structure of the hippocampus. 



Fig. 4. Portion of cortex along median sulcus, {d. Fig. 2.) 



Fig. 5. Small area from thalamus at c, Fig. 2. 



Fig. 6. Deeper part of lateral cortex, (Fig. 2d.) The cells ai)parently flask- 

 shaped, with the acute apical process median. Is this due to obli([ue section of 

 pyramidal cells ? 



