FIG. 238. ORANG-OUTANG. LEVEL OF IHH LNFEKIOH COLLICULUS. 



CEN, Central Gray iMattor; err, Central Tegmental Tract; ic, Interior C^olliculus; Lr, Lateral Fillet; mf, 

 Mesial Fillet; ntk. Trapezoid Nucleus; N4, Trochlear Nerve; pd, Predorsal Bundle; pl. Posterior Longitudi- 

 nal Fasciculus; i>n. Pontile Nuclei; i>v. Pyramid; RiiP, Reticular Formation; rst. Rubrospinal Tract; si>T, 

 Spinothalamic Tract; si>x. Crossing of the Superior Cerebellar Peduncle; tmt, Tractus Mesencephalici 

 Trigemini. (Accession No. 199. Section 594. Actual Size 19 X 19 mm.j 



I524I 



