TtTRNEK, MorfJioloffv of the Avion Hrahi. 77 



Cells of the first type are fusiform, or flask-shaped. They 

 stain faintly, and contain a large, clear, granular, sub-spheri- 

 cal nucleus and a dense nucleolus. 



The cells of the second type are pyramidal in form. They 

 have straight or concave outlines and a broad base. The 

 apex of the cell is extended into a long process, while the 

 base is supplied with several shorter processes. These cells 

 stain densely and have an elongated dense nucleus and a 

 denser nucleolus. 



5. The mesal division of the mantle contains fusiform 

 cells only. 



6. The lateral division of the mantle contains pyramidal 

 cells only. 



7. The corpus striatum contains both fusiform and pyra- 

 midal cells. 



8. There is a portion of the avian striatum in which 

 small cells, resembling Deiter's corpuscles, are developed. 



9. In the brain there may be an entad projection of grey 

 matter, without any external indication of a convolution. 



