52 THE LOWER PRIMATES 



of the lateral lobe is a large, irregular and rather diffuse collection of cells, 

 the nucleus dentatus (Ndt). From this nucleus arise the fibers which 

 make their way out of the cerebeUum, providing the efferent pathway for 



FIG. 



LEMUR MONGOZ. LEVEL OF THE CEREBELLAR NUCLEI. 



CIR, Juxtarcstiform Body; ctt. Central Tegmental Tract; icp, Inferior Cerebellar Peduncle; lf, Lateral 

 Fillet; nd, Nucleus of Dciters; ndt. Dentate Nucleus; nf, Facial Nucleus; nfg, Nucleus Fastigii; nod, 

 Vermis Cerebelli; nr. Nucleus of Rolando; nsc, Nucleus of Schwalbe (Triangularis); ntr, Trapezoid Nucleus; 

 N7, Facial Nerve; n8. Auditory Nerve; pd, Predorsal Bundle; PL, Posterior Longitudinal Fasciculus; py. 

 Pyramid; ref, Reticular Formation; rst. Rubrospinal Tract; scp, Superior Cerebellar Peduncle; TRD, 

 Descending Trigeminal Tract; trp. Trapezoid Body; ver, Vermis. [Accession No. 147. Section 163. Actual 

 Size, 15 X 10 mm.] 



cerebellar impulses which regulate the coordinative control ut the muscles. 

 The relative size of the dentate nucleus is consequently of much significance, 

 as it indicates to what degree the cerebellum contributes to the tunction of 



