Herrick, Nnvus Tcrwinalis of Frog. 



185 



olfdcl 



onus 



septL 



tnolfdctori as ined. 

 nied. fore bra in bundle 

 [at fore bra in bu^ndle 

 n.termLndUs 



vetitro-ldterdlis 



Fig. T). Through the cerebral hemisphere hetween tlie olfactory hnlh and the 

 lamina termiualis. X 30. 



The lateral and medial basal forebrain bundles are impregnated and the 

 neurones marked a and It send their axones into these two bundles respectively. 

 The tract marked tr. olfactorius incdialis contains also other elements, par- 

 ticularly olfactoi-y fibers of the third order for the nucleus medianus septi. 

 The ventral fibers of the lateral secondai'y olfactory tract are impregnated, 

 but not the dorsal fibers of this tract. The nervus terminalis lies ventrally 

 of the median forebrain bundle and laterally of the tr. olfactorius medialis. 



