266 



ANATOMY OF THE DOMESTIC FOWL 



Fig. 75. — The brain of a hen. Photograph. 



A. Upper surface of the brain. 1, Medulla oblongata. 2, Calamus scrip- 

 torius. 3, Cerebellum. 4, Optic lobes. S- Transverse fissure. 6, Longitudinal 

 fissure. 7, Upper surface of the left cerebral lobe. 8, Upper surface of the 

 right cerebral lobe. 9, Lateral pillar of the cerebellum.. 



B. The posterior surface of the eyeball. 10, The sectioned surface of the 

 optic nerve. 



C. The inferior stirface of the brain. 11, Corneo-scleral juncture. 12, The 

 cornea. 13, The sclera. 14, The optic nerve. 15, The optic chiasm. 16, The 

 olfactory lobes. 17, The medulla oblongata. 18, Tuber cinererum et infundib- 

 ulum. 



