112 Cerebellum. 



*!&& 



t 



453. The Cerebellum, view from before. The Tonsils completely, 

 the Cuneiform Lobes partially removed. Natural size. 



Upon the under surface of each hemisphere of the cerebellum 

 are four lobes (see Fig. 451): 



a) The inferior posterior lobe, Lobus inferior posterior s. 

 semilunaris ; 



b) The cuneiform lobe, Lobus cuneiformis (this comprises the 

 two lobes usually called digastric and slender lobes) ; 



c) The a 'm y g d a 1 a or tonsil, Tonsilla, projecting into the fourth 

 ventricle; finally 



d) The Flocculus s. Lobulus. with the Pedunculus flocculi, which latter 

 reaches down to the inferior vermiform process as posterior medul- 

 lary vein m, Vdum cerebelli postering. 



The middle portion of the cerebellum lying in the valley, is called 

 inferior v e r m i f o r m p r o c e s s, Verm is inferior ; the parts entering 

 into the composition of this body are: 



a) The Tuber valvu/ae or Commissura brevis, uniting the inferior 

 posterior lobes of the two sides; 



b) The pyramid, connecting the digastric lobes; 



e) The uvula, placed between both tonsils, and 



d) The nodule, Nodulus Malacarni, the anterior pointed termination 

 of the inferior vermiform process, which is connected to the peduncles of 

 the flocculus by means of the posterior medullary velum. This 

 velum is of a semilunar form on each side, its anterior margin being 

 free and concave, its posterior convex margin continuous with the central 

 white substance of the inferior vermiform process ; between it and the 

 nodule and uvula behind, is a deep fossa, called the swallow's nest. 



