TROGLODYTES GORILLA 



671 



than the other two great anthropxjid^. The tuncti.r.al significance of the 

 expansion, increased definition and convolution in the dentate nucleus of 

 gorilla, as compared with the lower members of the primate group, needs 



FIG. 304. GORILLA. LE\ EL OF THE CEREBELLAR NUCLEI. 



CBL, Cerebelluin ; icp. Inferior Cerebellar Pedunde; mcp. Middle Cerebellar Peduncie; VF, Mesal Fillet; 

 NAB, Abducens Nucleus; nut. Dentate Nucleus: nfg. Nucleus Fastigii; n6, .\bducens Nerre; n— , Facial 

 Ners-e; py. Pyramid; \"ER, N'ermis; iv. Fourth Ventride. [Accession No. J. D. Sectioa 571. .\ctual Size 

 40 X 22 mm.] 



scarcely more than passing mention. TTiis f>oint has been touched u|X)n so 

 frequently with reference to cerebellar organization, that its bearing must be 

 clear. In _ :he cerebellum shows notable exp>ansions in the region of its 



lateral lobcs CbL. e their efferent representation in the dentate 



nuclei. The vermis i \ c r , i; ' :s vested coordinating function for control 



of the axial and paraxial musculature of the ; ' - "' ■ ' no such 



progressive advance. It' - "act shown : " c variation throughout the 

 entire vertebrate ' ccause the axiai musculature is rigidly fixed in 



