THE BIIAIN. 



55 



The Cranial Nerves. 



The nerves passing- off from the brain were larg-e, and can be made 

 out with reasonable certaiut}-. The olfactory lobes were separated in 

 front by an osseous septum, the position of which is shown distinctly in 

 Plate VI, figure 2 



Fie;, ' 



Figure 59. — Cast of hrain-eavity of Tinoceras iiiyens, Marsli(No. 1041); sidi; view. 

 FlQURE CO. — The same ; superior view. 



c. cerebral hemispheres; ch. cerebelhini: /. Hiecuhis; m. ineiUilUi ; nt. olfactory lobes; op. optic nerves: 



V. fifth nerve; XII. twelfth nerve. 



Both fionres are three-fourths natural size. 



