SKULL OF HESPERORXIS. 



Figure 1. — Outline of skull and brain-cavity of Eesperornis regalis, Marsh; seen from above; three-fifths 



natural size. 

 Figure 2. — Outline of skull and brain-cavity of Loon, (Coln/mbus torquatus, Brunnieh) ; same view ; natural size. 

 Figure 3. — Cast of brain-cavity of young Alligator ; seen from above ; natural size. 



ol. olfactory lobes; c. cerebral hemispheres ; op. optic lobes; cb. cerebellum; /. flocculi; in. medulla. 

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