Stroud, Mammalian Cerebellum, 117 



b. The mesal beginning of the vermian lobes and the sulci which demar- 

 cate them. 



c. The postpil^um upon each side is still smooth. 



Fig. 70. Left lateral aspect. Shows the lateral aspect of the same features 

 as Fig. 69 and, 



a. The paraflocculus and its sulcus. 



d. The flocculus and its sulcus. 



c. The kilos and parepicoele. 



d. The auditory region and eighth nerve. 



e. The peduncle of the cerebellum. 



Fig. 71, Caudal aspect of the cerebellum of a human embryo, No. 2947, 

 male, 15 cm. long (x 6.7). The relation of the paraflocculus has been added 

 from No. A. 827, human embryo, male, 16.5 cm. long. The caudal part of the 

 left postpileum has been sliced off so as to show the relation of the flocculus 

 and paraflocculus ; compare Fig. 65, PI. VII. Shows the beginning of the 

 general regions and structures to be found in the adult organ. 



Figs. 72, 7j, 74. The cerebellum of a child at term. No. 2961, female, 

 (X2.3). 



Fig. 72. Dorsal aspect. Shows the division of the organ into lobes and 

 folia. Compare with Figs. 68, 69, PI. VII. 



P^S- 73- Shows the caudal aspect. Compare with Figs. 65, 69, 71. Note, 

 that the flocculus and paraflocculus are almost entirely concealed by the postpil- 

 eum and parepiplexus. 



Fig. 74. Shows the cephalic aspect. Compare with the preceeding fig- 

 ures. Note, 



a. The flocculus. 



b. The eighth nerve. 



c. The peduncle. 



d. The pons. 



e. The prevermis (culmen, central lobe, cephalic lobe); thelingula does not 

 appear. 



f. The crura. 



These three figures show the condition so characteristic of the adult organ, 

 i. e., the division into lobes by deep sulci and the subdivision of the lobes them- 

 selves into narrow folia by the shallower crevices or rimulse.^ The probable 

 use of this profuse foliation is to give a greater amount of potential cinerea. The 

 structure will be further discussed in part II. 



^^^- 75- Caudal aspect of an adult human cerebellum. No. 31 17, male, 

 (x about I). 



1. The term rimula was proposed by Wilder, 36, 125. 



