CALLITHRIX JACCHUS, THE MARMOSET 



171 



function as the Icmiiuis. The restiform bt)dy ( ICP), which represents the 

 aggregation of ascending libers passing to the vermis of the cerebellum, 

 affords a suggestive index of coordinative control. The development of such 



FIG. 84. MARMOSET. LEVEL OF THE CEREBELLAR NUCLEI. 



CJR, Juxtarestiform Body; ctt. Central Tegmental Tract; icp. Inferior Cerebellar Peduncle; mf. Mesial 

 Fillet; nab, Abducens Nucleus; nd, Deiters' Nucleus; ndt, Dentate Nucleus; nfg, Cerebellar Nuclei, Mesial 

 Group; NOD, Vermis Cerebelli; nr. Nucleus of Rolando; nsc. Nucleus of Schwalbe; n6, Abducens Nerve; N7, 

 Facial Nerve; n8. Auditory Nerve; pd, Predorsal Bundle; pl, Posterior Longitudinal Fasciculus; PY, Pyra- 

 mid; REF, Reticular Formation; so, Superior Olive; trd, Descending Trigeminal Tract; trp, Trapezoid 

 Body. [Accession No. 146. Section 92. Actual Size 10 X 7 mm.] 



control in marmoset appears to be relatively less than in other primates, a 

 supposition which finds support in the relatively low degree of organization 

 in the cerebellum. 



