226 ©. JUDSON HERRICK 
‘The amygdala. of the frog, as. we have seen, receives a direct 
olfactory tract of the second order from the vomeronasal forma- 
tion, the tractus olfactorius. ventrolateralis, and is therefore 
to be regarded asa derivative-of the primitive lateral olfactory 
nucleus. It has in addition the following fiber connections, all 
of which are characteristic of regions of both lower and higher 
ire related with the olfactory complex:. Bek bea pi 
. A-commissural strand in the anterior commissure connected 
ae the amygdala of the opposite side. r 5 fe gt et 
dol. p. tr. 
nuc. o. p. tr. 
chr 
XXXI-2ES 
=- ae 
Fig. 12. Through the caudal edge of the chiasma mUee including the nucleus 
of the olfactory projection tract. 
Fig. 13. Neurons of the amygdala of Rana catesbiana. Golgi method. 
x 70. The section is from a horizontal series, left side, at the level of the inter- 
ventricular foramen; cf. figure 19. The broken line marks the outline of the 
amygdala, the arrow points rostrad, and the medial'surface is at the right. 
