6o4 



THE HIGHER ANTHROPOIDS 



size may be estimated the degree to wliich the animal lias developed not 

 only its volitional control, hut that regulation of motion dependent upon 

 the harmonious cooperation between the severallobes of the cerebral iiemi- 



FIG. 26(). CHIMPANZEE. LEVEL OF THE LATERAL GENICULATE BODY. 

 c.n\, (xntral Gray ALittcr; ctt. Central Tegmental Traet; ci>. Cerebral Peduncle; lgb. Lateral Geniculate 

 Body; MCI), Mesial Geniculate Body; mf, Mesial Fillet; noc. Oculomotor Nucleus; nru. Nucleus Ruber; pd, 

 Predorsai Bundle; pi,, Posterior Longitudinal Fasciculus; pul, Pulvinar; kef. Reticular Formation; sc, 

 Superior Collieulus; siix, Substantia Nigra; spt. Spinothalamic Tract. [Accession No. 157. Section 675. 

 Actual Size 38 X 15 mm.] 



spheres and llu- lateral lobes ol the eerel)elliim. lis ilinn'iisions m ehmii)anzee 

 thus indicate a high degree ol organization in these particulars. 



LENEL OF THL 1_ A I FKAL GENICULATE 1U)^^ ( FIC;. 269) 



This section is mlroduced largel\ with the purpose ol showing the 



.cons])icuous dimensions and appearand' ol the nuckuis rubi'i" (NRu). 



Some fibers in the oculomotor decussation iwv still sct'ii in connection 



with the oculomotor nucleus (,Noc). Laterally, Ijoth mesial and lateral 



