firm. 
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ama, 
z ant. 
yell 
ki y) Mii; - 
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d. f. med. t: S nuc, po. 
com. amg: —r po. 
n. Op. = 
17 
p. hip. 
lob. p. 
tr. ol. d.l. 
fh amg. 
} } tramq. p. 
So tr amg, hab. 
WARS a hab ant. 
Biss anf / (1 "pi Esa ~ d. ol. p. tr 
od ROASTS AN v. ol. p. th 
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ch. 
18 
Fig. 17 Section through the interventricular foramen and anterior com- 
missure; cf. figures 5 and 6. The amygdala is seen to be connected with the 
pyriform lobe by amygdalo-pyriform fibers and with the opposite side by two 
systems of fibers, one above and one below the decussation of the lateral fore- 
brain bundles. The ventral system, commissura amygdalarum (com. amg.), is & 
small compact fascicle of unmyelinated fibers which apparently form a true com- 
missure. The dorsal system is a more diffuse collection of fibers of various 
sorts, containing decussating fibers of the tractus amygdalo-habenularis (d. amg. 
hab.), mingled with those of the tractus septo-habenularis and perhaps other 
kinds of fibers. Amygdalo-habenular fibers are accumulating on the dorso- 
medial border of the amygdala; these are both myelinated and unmyelinated. 
Fig. 18 Section immediately caudad of the interventricular foramen at 
about the level of figure 7. Fibers of the olfactory projection system are passing 
ventralward, medialward, and spinalward from the amygdala, some dorsally of 
the lateral forebrain bundle (d.ol.p.tr.) and some ventrally of this bundle 
(v.ol.p.tr.). 
230 
