378 THE INTERMEDIATE PRIMATES 



superior olivary bocly( SO ). Lateral to this is a small portion of the nueleus 

 facialis ( N f ) which gives rise to the first portion of the se\eiith nerve, a series 

 ol line, myelinated fibers arranged more or less as a spray. It extends inward 



FIG. 177. MACACUS. I I \ II Ol IliH EMERGENCE OF THE SIXTH NERVE. 

 LIN, Llnguhi; MCP, Middle Cerebellar Peduncle; mf, Mesial Fillet; nab, Nucleus Abducentis; nf. 

 Facial Nucleus; nr, Nucleus of Rolando; n6, Abducens Nerve; Ny, Facial Nerve; I'D, Predorsal Bundle; 

 PL, Posterior Longitudinal Fasciculus; pn, Pontile Nuclei; pv, Pyramid; ref, Reticular Formation; trd, 

 Descending Trigeminal Tract; scp, Superior Cerebellar Peduncle; so, Superior Olive; trd. Descending 

 Trigeminal Tract; trp, Trapezoid Body; vex 4. Fourth Ventricle. [Accession No. I4<). Section 230. Actual 

 Size 20 X I'l iiini.l 



and backward toward the lloor of the fourth ventricle. From the superior oli- 

 vary nueleus a similar, but somewhat larger spray of myelinized libers 



