CALLITHRIX JACCHUS, THE MARMOSET i8i 



(Cph). The nucleus which forms the central core of this body is surrounded 

 by two fields of white matter constituting field Hi and field Hi of Forel. 

 Lateral to the optic thalamus and the nucleus hj-pothalamicus is a dense 



FIG. 90. MARMOSET. LEVEL OF THE ANTERIOR COMMISSURE. 



AC, Anterior Commissure; cin, Internal Capsule; cph, Corpus Hypothalamicum; for. Fornix; len. Lenticu- 

 lar Nucleus; nca. Caudate Nucleus; nmt. Medial Nucleus of the Thalamus; inli. Internal Lateral Nucleus 

 of the Thalamus; tt, Taenia Thalami. [Accession No. 146. Section 241. Actual Size 15 X 6 mm.] 



band of medullary substance comprising a portion of the internal capsule 

 (Cin); while ventral to this massive bundle of myelinized axons is a large 

 nuclear mass, the globus pallidus (Gib). This structure takes its importance 

 from the fact that it is one of the main basal ganglia regulating automatic 

 associated movements. Immediately mesial to the globus pallidus is a bundle 

 of faintly staining fibers, the descending pillars of the fornix (Fdp). 



