CALLITHRIX JACCHUS, THE MARMOSET 



167 



small bundle ol libers in this animal. This creates the impression that the 

 pyramidal system in its relation to the control of voluntary movement plays 

 but a small part in the animal's somatic behavior. 



FIG. 81. MARMOSET. LE\ EL OF THE TIP OF THE INFERIOR OLIVE. 



CEN, Central Gray Matter; dt, Deitcrso-spinal Tract; fle, Dorsal Spinocerebellar Tract; GOW, Ventral 

 Spinocerebellar Tract; hel, Spino-olivary Tract of Helweg; 10, Inferior Olive; mf, Mesial Fillet; nb, Nucleus 

 of Burdach; ng. Nucleus of Goll; nr, Nucleus of Rolando; pd, Predorsal Bundle; pl. Posterior Longitudinal 

 Fasciculus; pv, Pyramid; ref. Reticular Formation; rst, Rubrospinal Tract; spt. Spinothalamic Tract; 

 TRD, Descending Trigeminal Tract. [Accession No. 146. Section 22. Actual Size 8X5 mm.] 



LEVEL OF THE CAUDAL EXTREMITY OF THE INFERIOR OLIVE (FIG. 81) 



The appearance of the caudal limit of the inferior olivary body 

 (10) adds another striking feature to the next level. This structure 



