PLATE 31 
EXPLANATION OF FIGURES 
115 Transection slightly caudal to the level shown in fig. 114. Weigert method. 
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116 Transection slightly caudal to the level shown in fig. 115. Weigert method. 
alive 
com. horiz. + tr. rot. lent., commissura horizontalis plus tractus rotundo- 
lentiformis; com. trans., commissura transversa; corp. mam. (@), corpus mammil- 
lare, the ganglion mammillare of Goldstein; fasc. retr., fasciculus retroflexus ; 
nucl. dif. lob. lat., nucleus diffusus lobi lateralis; nucl. post. thal., nucleus posterior 
thalami; nucl. post. tub., nucleus posterior tuberis; nucl. prerot., nucleus prero- 
tundus; nucl. rot., nucleus rotundus; nucl. subrot., nucleus subrotundus; sac. vasc., 
saceus vasculosus; tr. cbl. tect., tractus cerebello-tectalis; tr. cbl. tect. + tr. rot. 
lent. + com. horiz., tractus cerebello-tectalis plus tractus rotundo-lentiformis plus 
commissura horizontalis; tr. cbl. hyp., tractus cerebello-hypothalamicus; tr. olf. 
thal. med., pars. dors., tractus olfacto-thalamicus medialis, pars dorsalis; its con- 
nection with the nucleus subrotundus comes out with great clearness in these 
figures; tr. olf. thal. med., pars. vent., tractus olfacto-thalamicus medialis, pars 
ventralis; in fig. 116, immediately lateral to the nucleus rotundus, is shown the 
termination of this tract; tv. rot. lob., tractus rotundo-lobaris; tr. thal. mam.., 
tractus thalamo-mammillaris; tr. thal. sp., tractus thalamo-spinalis (Kappers.) 
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