PLATE 26 
EXPLANATION OF FIGURES 
91-94 Neurones of the nucleus rotundus. Golgi method. X93. From sagit- 
tal sections. 
95-99 Neurones from different parts of the lobi laterales. Golgi method. X 
93. From sagittal sections. Fig. 95 is taken from the caudal angle of the lobe, 
fig. 96 from the ventro-medial area, fig. 97 from the latero-medial, figs. 98 and 99 
from the ventral area proper. 
100 Transection at approximately the same level as that shown in fig. 89. 
Weigert method.  X 17. 
com. horiz., commissura horizontalis; com. post., commissura posterior; com. 
trans., commissura transversa; fasc. retr., fasciculus retroflexus; nucl. ant. tub., 
nucleus anterior tuberis; nucl. dif. lob. lat., nucleus diffusus lobi lateralis; nucl. 
prerot., nucleus prerotundus; nucl. rot., nucleus rotundus; tr. cbl. tect. + com. 
horiz., tractus cerebello-tectalis plus commissura horizontalis; 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; tr. olf. thal. med., pars vent., tractus olfacto-thalamicus 
medialis, pars ventralis; tr. rot. lent., tractus rotundo-lentiformis; tr. strio-thal. 
cruc.+ tr. olf. hyp. lat., tractus strio-thalamicus cruciatus plus tractus olfacto- 
hypothalamicus lateralis; tr. thal. mam., tractus thalamo-mammillaris; tr. thal. 
sp., tractus thalamo-spinalis. 
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