730 



THE NERVOUS SYSTEM. 



and clivus or declive are each very large as compared to the other divisions of the 

 upper worm (Figs. 425, 428, 429). Taken together, they constitute the bulk of 

 the upper worm, and are the only parts seen in the natural position, for the cul- 

 men must be lifted anteriorly to show the central lobule, and the clivus posteriorly 



Sup. med. vd. 



Lingula 



FIG. 430. Anterior part of cerebellum from above. The central lobule and alse are drawn backward to dis- 

 close lingula. (Henle.) 



to show the folium cacuminis. On antero-posterior section each appears as made 

 up of a number of secondary folia with well-marked intralobular fissures. The 

 term monticulus is often applied to the combined culmen and clivus. The cres- 

 centic lobules, anterior and posterior, or lunate lobules, are large and have numerous 

 intralobular fissures. Taken together, on each side they constitute the so-called 

 quadrate or quadrangular or square lobule. The anterior crescentic overlaps the 

 ala and reaches to beyond the lateral limits of the anterior notch. The folium 

 cacuminis (see also Fig. 431) is smaller than any of the lobules of the upper worm 



Oudmen Folium cacuminis 



Post, cresc. lob. 



Tuber valvulse 



Postero-sup. lobe 



Pyramid ^Digastric lobe 



FIG. 431. The cerebellum from behind. (Henle.) 



except the lingula. Its cut surface looks like a single leaf or folium. Its lateral 

 prolongations, however, the postero-superior lobules (superior semilunar), are large, 

 each being fully as large, and beset with as many intralobular fissures, as either 

 of the crescentic lobules. 



Tuber Valvulae and Postero-inferior Lobules (Fig. 431). The tuber valvulce is 

 the posterior extremity of the inferior worm. It is decidedly larger than the 

 folium cacuminis, and its cut surface shows at least one secondary folium in addi- 

 tion to that of its own cut surface. Its point of junction, on each side, with the 

 postero-inferior lobule is slightly grooved. This groove is the posterior extremity 



