SURFACES. 



153 



o p 



Fig. 45. Anterior aspect of the mid-brain, pons and medulla. (Original). 



a. Interpeduncular fossa, b. Basis pedunculi. c. Pons. d. Trigeminal nerve, e. Ab- 

 ducent nerve, f. Acustic nerve, g. Facial nerve, h. intermediate nerve, i. Glosso- 

 pharyngeal nerve, j. Vagus nerve, k. Accessory nerve. 1. Hyppglossal nerve, m. An- 

 terior median fissure, n. Optic tract, o. Optic chiasma. p. Optic nerve, q. Stalk of in- 

 fundibulum. r. Corpus mammillare. s. Oculomotor nerve, t. Medial and lateral roots of 

 optic tract, u. Sulcus basilaris. v. Acustic nerve, w. Foramen caecum (Vicq d'Azyri). 

 x. Pyramid, y. Olive, z. Anterior lateral sulcus. aa. Posterior lateral sulcus. bb. Funic- 

 ulus lateralis. 



