220 Cc. JUDSON HERRICK 
19 to 21. We have sections of the brains of several other speci- 
mens of different species of frogs prepared by the methods of 
Golgi and Cajal and cut in various oblique longitudinal planes 
in which each of these tracts is clearly demonstrated for practi- 
cally its entire length in a single section. 
Since the cell bodies from which these fibers arise are not 
impregnated in these preparations, the direction of conduction 
is not demonstrated. The indications are, however, clear that 
the ventrolateral olfactory tract is mainly (probably exclusively) 
a descending system from the vomeronasal formation to the 
amygdala and free terminal arborizations of these fibers are seen 
lob. p. trol. dil. 
p. hip. z. lim. med 
troles.t+ce.f 
trol. v1. Zin ae 
septum fateh 
Cus: f.medt 
nuc. ac, : 
XXX1- 169 
lob.p. 
p. hip. 
trol. v.I. 
ety ag tela * AXKII9Y 
Fig. 2. Through the cerebral hemisphere between the vomeronasal formation 
and the lamina terminalis. The ventrolateral olfactory tract lies close to the 
ventricle in the zona limitans lateralis. 
Fig. 3. Through the rostral border of the lamina terminalis. On the left the 
ventrolateral olfactory tract is seen entering the rostral end of the amygdala. 
