94 BULLETIN OF THE LABORATORIES 



Fig. 10. Portion of area of the post-rhinal lobe [region of Fig 3a,) em- 

 bracing a portion of one of the granular masses as well as of the rhinomorphic 

 cells. 



Fig. 11. Portion of a section of the dorsal cortex near the meson. The 

 figure embraces a region near the surface and shows two kinds of cells. The 

 apex processes of the motor pyramids are very long, extending to near the upper 

 level of the cortex, while the cells of the second type have the cell body almost 

 unstained. 



Fig. 12. Cortex of the mesal surface near its ventral limit. The mesal 

 olfactory tracts are here breaking through the cortex. The position of the cells 

 is disturbed and the apical processes dip out of the section. The surface is at 

 the right. 



PLATE B. 



A series of eight horizontal sections through the entire brain beginning 

 ventral and passing cephalad of the anterior commissure. 



Fig. 8. A horizontal section through the superior commissure. 



PLATE C. 



Fig. 1. Portion of the cortex from the dorsal surface near the median fis- 

 sure, extending as far entad as the giant pyramids. (Slide 28.) The cells are 

 chiefly motor pyramids. 



Fig. 2. Large pyramids of the parietal region, from a horizontal section. 

 Camera drawing with one fifth inch objective. 



Fig. 3. Ectad pyramid cells from proecrucial lobe near the median line. 

 Camera drawing with one-inch objective. 



Fig. 4. A few pyramid cells from the dorsal cortex drawn with one- fif- 

 teenth inch objective and camera. Observe the nutrient cells at the base in 

 each case. 



Fig. 5. Typical sensory cells from near the base of the cerebrum. 



Fig. 6. Portion of the occipital cortex showing the two kinds of cells. 



Fig. 7. Portions of the lateral cortex ventrad of the rhinalis fissure and 

 beneath the olfactory fibre zone. The neuropilem above lies just entad of the 

 radix laterals tract. 



Fig. 8. Cells from the hippocampus at Fig. 5a, Plate A. showing the rela- 

 tions of the processes of the cells of the gyrus fornicatus to the ectal traOt. 



Erratum. — Page 86, line 11, for splenial read spherical. 



