TARSIUS SPECTRUM 131 



region is the ascending trigeminal tract. Arcuate filsers passing inward 

 from tlie region of this latter tract sweep forward to decussate in the dorsal 

 decussation of Meynert. Decussating fibers occupying a still more ventral 



FIG. 61. TARSIUS SPECTRUM. LEVEL OF THE OPTIC CHIASM. 



CEN, Central Gray Matter; ctt. Central Tegmental Tract; cp, Cerebral Peduncle; lgb, Lateral Geniculate 

 Body; mf. Mesial Fillet; mgb, Mesial Geniculate Body; nli, Nucleus Lateralis Internus Thalami; opt. 

 Optic Tract; opx, Optic Chiasm; rem, Tractus Retroflexus of Meynert; \'3, Third \'cntricle. [Accession 

 No. 210. Section 261. Actual Size 10 X 10 mm.] 



