376 



shall call the "ala noduli", is merely the lateral prolongation of the 

 nodulus. At this stage also another fissure makes its appearance in 

 the section on the dorsal side of the copula pyramidis — this is the 

 fissura parafloccularis (Fig. 17). 



Fiss. postnodularis 



Nodulus 



Fig. 14. 



Ala noduli 

 Fig. 15. 



Fiss. secunda 



'Lobus medius 



' Str. gran, lobi med. 

 Ala noduli 





)S— 





- - - Fiss. 



paraf 



oca 





"" ~ Copula 



py r - 









- Rec. lat. 



ventr 



IV 



Fig. 16. 



Fig. 17. 



X35. 



Fig. 14. Part of the section shown in Fig. 6. X 35. 



Fig. 15. Part of the section shown in Fig. 7. X 35. 



Fig. 16. Part of the section shown in Fig. 8. X 35. 



Fig. 17. Part of a section midway between those represented in Figs. 



and 10. 



If the series of sagittal sections be traced further in the lateral 

 direction the granular matter of the copula pyramidis and the ala 

 noduli will be found to become continuous at their caudal extremities 

 Figs. 10 and 11): and a curved bar of grey substance is formed which 

 bends forward around the middle peduncle of the cerebellum. This 



