PLATE 40 
EXPLANATION OF FIGURES 
140 Diagram of a horizontal projection of the olfactory centers showing the 
connections of the postecommissural olfactory nuclei, with the exception of the 
habenular fibers shown on fig. 142. Fibers which terminate in these centers are 
shown on the right, while those which originate from them appear on the left. 
<lZ: 
com. nucl. preopt. (red), commissura nucleorum preopticorum; tr. entoped. 
preopt. (red), tractus entopedunculo-preopticus; tr. intermed. preopt., pars ant. 
(red), tractus intermedio-preopticus, pars anterior; tr. intermed. preopt., pars med. 
(red), tractus intermedio-precpticus, pars medialis; tr. lat. preopt. (red), tractus 
lateralis preopticus;tr. med. preopt., pars ant. (blue), tractus mediano-preopticus, 
pars anterior; tr. med. preopt., pars post. (blue), tractus mediano-preopticus, pars 
posterior; tr. olf. med., pars lat. (blue), tractus olfactorius medialis, pars lateralis 
(see fig. 186); tr. posthab. preopt. (red), tractus posthabenulo-preopticus; ¢r. 
practh. cin. (blue), tractus praethalamo-cinereus: tr. preopt. entoped. (red), 
tractus preoptico-entopeduncularis; tr. preopt. intermed., pars ant. (red), tractus 
preoptico-intermedius, pars anterior; tr. preopt. intermed., pars lat. (red), tractus 
preoptico-intermedius, pars lateralis; tr. preopt. intermed., pars med. (red), tractus 
preoptico-intermedius, pars medialis; tr. preopt. lat. (red), tractus preoptico- 
lateralis; tr. preopt. posthab. pars ant. (red) tractus preoptico-posthabenularis, 
pars anterior; tr. preopt. posthab., pars post. (red), tractus preoptico-posthab- 
enularis, pars posterior; tr. preopt. tub. (blue), tractus preoptico-tuberis. (For 
other abbreviations see explanation of fig. 136.) 
334 
