THE BKAIN IN THE EDENTATA. 



371 



The cerebellum in the Armadillos apjiareatly differs iu such a marked manner from 

 that of the other Edentates that we must consider it in more detail. 



I shall describe the cerebellum of Xontti'iis, which is typical of the family. 



The cerebellum of Xetmnis, which is apparently constituted so differently from the 

 cerebellum in the other families of Edentata, is really built upon the same plan. Its 

 most marked peculiarity is due to the fact that the lobus centralis extends forward like a 

 hood and completely hides the lobus aidicus from view. But if we remove the cerebral 

 hemispheres and the anterior part of the brain-stem, and examine the anterior surface of 

 the cerebellum (fig. 30), we shall find atypical anterior lobe bounded by Sijissura prima. 



tlocCuIUB 



Corp. quadngem 



Anterior surface of cerebellum of Xenunis. Nat. size. 

 The right half of the meseucophalon is delineated hi situ. 



fiss. prima . 



lob. central.' 



fies. secunda 

 lob. post.----j 



medulla oblong.-- 



Fis. 31. 



area B 



•paraflooc. 



area C 



Eight half of dorsal surface of corebelhiin of Xi:nufus. Enlarged |- diam. 

 X. Grey band connecting 2^1/romis to pnrafloc-nhi^ ihirsalls!. ij. Bare area of medullary substance. 



area C 



Lparaflocc. 



flocculoa 

 lob. post. 



Caudal surface of cerebellum of Xi^nxirui. Mat. size. 



