390 THE HIGHER ANTHROPOIDS 



of dentate difrcrentiation. It presents the undulating and eonNoluted appear- 

 ance in the outer wail of its structure. It is definitely sacculated in form; and 

 it has a well-defined fundus. But the degree of the convolution is so niarl<.ed as 

 to encroach upon the fundus in such a way as to reduce materially its capac- 

 ity lor myelinized fibers. 



What the configuration of the dentate nucleus of the chimpanzee may 

 actually signify, and how it should be interpreted with reference to the func- 

 tional capacity of this structure, are problems requiring further investiga- 

 tion. It is, however, worth noting that such a difTcrence does exist in the 

 chimi^anzee and is sufficient to distinguish it from both the lower primates and 

 the higher forms. It is possible that too much emphasis is laid upon this dis- 

 tinction and that this high degree of convolution in the saccular wall of the 

 dentate nucleus really implies a far greater degree of specialization than in 

 other species. On the other hand, the conditions as compared with those in 

 man lead to the conclusion that specialization in chimpanzee, although 

 along the lines of greater complexity, is not following the direction prescribed 

 by the human mode of development which gives rise to a dentate nucleus in 

 many characteristics quite difl'erent from that of the chimpanzee and much 

 more in harmony with the gorilla. If any inference is justified with reference 

 to the functional capacity of the cerebellum, it might properly be that the 

 chimpanzee is endowed with eoordinativc control which is at least equal to 

 that of tlu' highest jMimate. The studies of behaxior, already quoted in con- 

 nection with tlu' animal, emjjhasize the remarkable feats of strength and 

 dexterity of the fore- and hindlimbs. They demonstrate a capacity for 

 acquiring jjerformaiices of a skilled nature, some of which surpass in their 

 complexity those attainable l)y man. All of these facts signify that the chim- 

 panzee possesses a range and variety of skilled performances which ma\ 

 easily rival those of the highest j)rimates. That it does not apply these eoor- 

 dinativc capacities in the execution of the many di'licate and precise acts 



