OF DENISON UNIVERSITY. 85 



PLATE V. 



C. L. Herrick. 



Fig. I. Section somewhat cephalad from Plate IV, Fig. 2. The crossing- 

 of fibres from the paries of the thalamus to the hemisphere, is shown. 



Ftg. 2. Transverse section farther caudad, showing adhesion of the hippo- 

 campus with the corpus callosum, also the position of the descending fornix 

 fibres near the medio-ventral portion. 



Fig. 3. Transverse section of hemisphere at the caudad extremity of the 

 hippocampus. 



Fig. 4. The entire brain seen from the dorsal aspect. For results of elec- 

 trical stimulation see page 38. 



Fig. 5. The same viewed from the ventral aspect. 



Fig. 6. Another brain dissected and laid oj>en to display the corpora .|u.i'l- 

 rigemina, thalamus, ventricles, etc. 



PLATE VI. 

 C. L. Herrick. 



This plate illustrates the distribution and arrangement of the cellular ele- 

 ments in the postero-median areas of the cortex. 



/Vg. I. (IIIf-12^ ) Giant or ganglion cells from a transverse section of the 

 right hemisphere near the posterior part of dorsal surface and near the middle 

 of transverse diameter. Chiefly centrifugal cells ; a few centri[)olal. «/amera. 

 Magnified about 165 diameters. 



Fig. 2. (VI^-15^.) Portion of transverse section in front of infundibulum 

 at a point about 5 mm. from median line, giant or ganglion cells from the area 

 governing sphincter of eye-lids. Camera, x 165 



P^S- 3- (^1^-15/".) Cells from the same section and depth, but farther from 

 the median line and hence in the sensory area. Camera, x 165. 



Fig. ^. {N\d-ba) Portion from transverse section in advance of Fig. I. 

 showing the upper part of the cortex in the sensory area. The section appear>i 

 to be a little in advance of exit of oculo-motor roots. Camera, x 165. 



^'^- 5- {VI'^-3«.) From a transverse section a little back of the chiasn>. 

 Extreme lower part of the lateral surface of cortex, near the sulcus and occupy- 

 ing same relative position as (VI-i/;/^) multipolar and centripetal cells of niitldic 

 zone of cortex. 



Fig. 6. (IIId/-i6.) Section near the chiasm. Camera, x 165. CJiant cclU 

 of motor area, x 250, l-io inch objective and camera. 



Fig. 7. Opossum, at juncture of fibre layer and cortex, near median fissure, 

 half way from crucial sulcus to front. Section longitudinal. 



Fig. 8. {Wb-'ja.) Radial longitudinal section taken with corpus <|uadrigc- 

 minum as a centre passing through a point midway between median fissure and 



