PLATE 20 
EXPLANATION OF FIGURES 
78 Transection through the ganglia habenularum. Toluidin blue method. 
x 46. 
com. horiz., commissura horizontalis; corp. gen. lat., corpus geniculatum 
laterale; fib. ans., fibrae ansulatae; hab., habenula, showing characteristic arrange- 
ment of cells; hyp., hypophysis; lob. inf., lobus inferior; nucl. ant. thal., nucleus 
anterior thalami of Goldstein; nucl. posthab., nucleus posthabenularis, ‘Das 
posthabenulare Zwischenhirngebiet’ of Goldstein, ‘Die posthabenulare Zwischen- 
hirngegend’ of Bela Haller; nucl. preopt., pars parvocell. post., nucleus preopticus. 
pars parvocellularis posterior; nucl. prerot., nucleus prerotundus; nucl. vent. tub., 
nucleus ventralis tuberis. 
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