6o 



THE L0\\ ER PRIMATES 



dorsal boundary is created by a narrow band of transversely disposed 

 fasciculi forming tlie mesial fdlet (Mf). This line of boundary indicates 

 the division between the basis po7itis situated ventrally and the teg77ie7%tum 



FIG. 30. LEMUR MONGOZ. LEVEL OF THE MIDDLE OF THE PONS VAROLII. 



CEN, Central Gray Matter; ctt, Central Tegmental Tract; cow, Ventral Spinocerebellar Tract; lf, Lateral 

 Fillet; mf, Mesial Fillet; mcp, Middle Cerebellar Peduncle; nbe, Nucleus of Von Bechterew; nr, Nucleus of 

 Rolando; pd, Predorsal Bundle; pl, Posterior Longitudinal Fasciculus; pn". Pontile Nuclei; pv. Pyramid; 

 REF, Reticular Formation; rst, Rubrospinal Tract; scp, Superior Cerebellar Peduncle; spt, Spinothalamic 

 Tract; trp, Trapezoid Body; tur, Tractus Uncinatus of Russel (Hook Bundle). (Accession No. 147. Section 

 208. Actual Size, 14 X 5 mm.] 



po7-itis, situated dorsally. In the dorsolateral aspect of the section are three 

 conspicuous tracts, the ventral spinocerebellar tract (Gow) making its 

 way toward the vermis, ventral to which is the tractus unci?ja/us of Russel 

 (Tur), while immediately in front of this is the superior cerebellar 

 peduncle (Scp). In the angle between the superior cerebellar peduncle 



