6-0 THE HIGHER ANTHROPOIDS 



this p)o«ti!re. As a matter of fact, this p>osition is so infrequently assumed and 

 perf':>r _ .r as to require in and of itself but small 



.. central axis. 



FIG. 303. GORILLA. LEVEL OF THE CEREBELLAR NL CLEL 



CBL, Cerefaeliuni; : js; icy. Inferior Cerebellar Peduncle; mcp. Middle Cerebellar Peduncle; ndt. 



Dentate Nucleus; s^jl., v. . ^i^; nr, Nudeus of Rolando; n8, Audrtor>- Nerve; obl. Oblongata; Fi", Pj-ramid; 

 REF. Reticular Fomaation; tkd. Descending Trigeminal Tract; ver. Vermis; rv". Fourth \'entricle. [Accession 

 No. J. D. Section 515- A ' "-e 45 X 25 mm.] 



The cerebellar nuclei and particularly the dentate nucleus (Ndt) show 

 a most striking advance (Fig. 303). Not only has there been a great increase 

 in the size of this nucleus which represents the efferent transmission of 

 cerebellar impulses, but it has also manifested that outstanding feature of 

 specialization whenever cerebral expansion is necessan,-, namely, a greater 

 tendency toward convolution. The nucleus dentatus in gorilla is much more 

 highly organized in this particular than in either the orang-outang or chim- 

 panzee. TTiis differentiation furnishes another reason for the claim that in 

 certain details of its encephalic structure the gorilla stands nearer to man 



