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ANATOMY OF THE CENTRAL NEKT0U8 SYSTEM. 



1. The position with reference to the corpora quadrigemina, from 

 beneath which the anterior cerebellar peduncles pass to the cerebellum. 



2. The general conformation, with the vermis in the middle and the 

 hemispheres are subdivided into separate rather large lobes. Those of the 

 vermis are arranged about the medullary portion in a position simulating 

 the blades of a ship's propeller (see Pig. 206). 



The vermis is connected on the right and left with the white substance 

 of the cerebellar hemispheres, which are divided into lobes by deep fissures 

 and into ridges by shallow ones. 



Fig. 203. — The cerebellum. (Dorsal aspect.) 



The dorsal surface of the vermis is called the superior vermiform proc- 

 ess. It is divided into: — 



(A) Lingula, far forward between the peduncles. 



{B) Lohulus centralis, passing into the alas lobuli centralis on each side. 



(C) Moniiculus, or mount, of which the anterior part is called the culm 

 and the posterior part the declivity. 



(D) Folium vermis, or fol. cacuminis, at the posterior end of the supe- 

 rior vermiform process. 



(E) Tuber vermis, or tuber valvuls3. 



