342 



C. JUDSON HERRICK 



trt.th.h.c.ax, 

 trt!h.h.c.a 



Trt.Th.r 



trrtth.h.c.p. 



rYmes. 



Fig. 56 Section from a different specimen and in a slightly different plane, 

 the ventral side being somewhat farther lateral than the dorsal. The rostral 

 end of the section lies at a level between those of figures 53 and 54; the caudal 

 end is in about the same plane as figure 55. The optic tract is not impregnated. 

 The free endings in the pars optica thalami (p.o.th.) are not optic fibers. Thej' 

 apparently belong to the tractus tecto-thalamicus et hypothalamicus cruciatus 

 anterior after its decussation {tr.t.th.k.c.a.x.). The tractus tecto-thalamicus 

 et hypothalamicus cruciatus posterior (Ir.t.th.h.c.p.) is well impregnated and 

 among its fibers are some free endings in the thalamus of the tractus tecto-thal- 

 amicus rectus (tr.t.th.r.); cf. figure 55, in which the tractus tecto-thalamicus et 

 hypothalamicus cruciatus posterior is very slightly impregnated. X 30 (ciiic, 

 2-1-1). 



