eti\tKe\\a\ root 



Tr.o\f .loli.mcd 



rv.fcrm- 



-raA o\^. lat, 



caA . o\f . me c} .Wob 



rr.o\f\olj. 



Tig.S. 



o\t. UK. 



Fig. 2, Transection (liruugli the middle of tlie right olfactory crus of a 50 

 cm. carp. Weigert metliod. X 21 (Zeiss comp. oc. S, ohj. A* reduced to two- 

 thirds), n. term., nervus terminalis ; md. olf. hit., radix olfactoria lateralis; 

 rad. olf. mod. prop., radix olfactoria mediaiis propria; tr. olf. loh. incd., 

 tractus olfacto-lobaris medialis. 



Fig. 3. Transection through tlie caudal part of the right olfactory crus 

 of a carp 50 cm. in length. Weigert method. X ^^ (Zeiss comp. oc. G, obj. 

 AA, reduced to two-thirds). This is a section innnediately rostrad of the 

 cerebral hemispheres and shows essentially the same features as Fig. 2. 



