PLATE 21 
EXPLANATION OF FIGURES 
79 Transection slightly caudal to the level shown in fig. 77. Weigert method. 
ye lee 
80 Transection through the nucleus anterior tuberis. Weigert method. > 17. 
a, see fig. 76; com. Herrick., commissura Herricki; com. horiz., commissura hori- 
zontalis; com. post., commissura posterior; com. trans., commissura transversa; 
corp. gen. lat., corpus geniculatum laterale; fasc. lat. hem.<——, fasciculus later- 
alis hemisphaerii; fasc. med. n. opt., fasciculus medialis nervi optici; fasc. retr., 
fasciculus retroflexus; fib. ans., fibrae ansulatae; fib. tect. n. opt., fibrae tectales 
nervi optici; hab., habenula; hyp., hypophysis; lob. inf., lobus inferior; nucl. ant. 
thal., nucleus anterior thalami; nwel. ant. tub., nucleus anterior tuberis; nucl. lat. 
tub., nucleus lateralis tuberis; nucl. prerot., nucleus prerotundus; nucl. vent. tub., 
nucleus ventralis tuberis; tectum, tectum opticum; for. long., torus longitudinalis; 
tr. hab. dien.——, tractus habenulo-diencephalicus; tr. hyp. olf. med., tractus 
hypothalamo-olfactorius medialis; tr. olf. thal. med., pars dors., tractus olfacto- 
thalamicus medialis, pars dorsalis; tv. olf. thal. med., pars intermed.<——, tractus 
olfacto-thalamicus medialis, pars intermedia; tr. olf. thal. med., pars vent., tractus 
olfacto-thalamicus medialis, pars ventralis; tr. opt. tractus opticus, tr. praeth, cin., 
tractus praethalamo-cinereus; tr. strio-thal. incruc.<——, tractus strio-thalami- 
cus incruciatus; tr. tub. dors., tractus tubero-dorsalis; valvula, valvula cerebelli. 
296 
