THE AMYGDALA IN AMPHIBIA 225 
axons downward into the olfactory projection tracts, while 
the axons of the smaller ones are directed laterally and dorsally 
into the pyriform lobe (tractus amygdalo-piriformis). 
In Golgi preparations in which the cell bodies and dendrites of 
none of the intrinsic neurons of the amygdala are impregnated 
the entire structure is filled with a very dense neuropil of fine 
fibers. These are axons, apparently chiefly of extrinsic origin, 
_and this neuropil may be divided into two incompletely separable 
parts, one at the rostral end related chiefly with the ventro- 
lateral olfactory tract, and below this a larger part related with 
the hypothalamic, habenular, and commissural connections. 
com. hab. 
d. ol. p.tr. 
f lat.t 
Ch. 
Fig. 10 Through the habenular commissure and the rostral border of the 
optic chiasma. The olfactory projection tract is passing ventralward, medial- 
ward, and spinalward along the medial border of the lateral forebrain bundle. 
Fig. 11 Through the caudal part of the chiasma ridge and postoptic com- 
missure complex and the posterior poles of the cerebral hemispheres. 
