584 



THE HIGHER ANTHROPOIDS 



nucleus of Sfhwalbc ( NSc). Adjacent anti lateral to this trianmilai' nuelcLis 

 is an area characterized by the ])rescncc of small scattert'd bundles oi 

 myclinized libers in a field of gra^' matter, tlu- nucleus of Deiters (ND). 



FIG. 2j(.). CHIMPANZEE. LEVEL OF THE \EsilUlLAK NUCLEI. 

 AMB, Nucleus Ainbifjuus; < rr, Ontral Tegmental Tract; dt, Dcitcrso-spinal Tract; cow. Ventral Spino- 

 cerebellar Tract; icp. Inferior Cerebellar Peduncle; 10, Inferior Olive; mi-, Mesial Fillet; nar. Nucleus Arci- 

 forniis; nd, Nucleus of Deiters; MS, Nucleus Solitarius; nhy, I lypoglossal Nucleus; nk. Nucleus of Rolando; 

 NSC, Nucleus of Sclnvalbi-; n\ i>. Dorsal Vagal Nucleus; pd, Predorsal Bundle; PL, Posterior Longitudinal 

 Fasciculus; py. Pyramid; mi-. Reticular F'ormation; rst, Rubrospinal Tract; spt. Spinothalamic Tract; 

 TRD, Descending Trigeminal Tract. [Accession No. 157. Section 221. Actual Size 18 X mni.l 



Many libers ol the \-estibiilar di\ ision ot the eiohth ner\ c entei' this nucleus. 

 Thus, while the central fi;ray matter still presents those specializations 



