314 



C. JUDSON HERRICK 



trtth.h.c.p. 



Fig. 19 Two sections farther caudad through the habenidar commissure 

 (com.hab.) and postoptic commissure. X 22 (cvic, 155). 



Fig. 20 Five sections farther caudad through the pars intercalaris dien- 

 cephali (p.i.ih.), illustrating the connection of the tractus preoptico-intercalaris 

 (tr.po.i.) with this part. The origin of the tractus thalamo-frontalis anterior 

 (tr.th.f.a) from the pars dorsalis thalami (p.d.th.) is seen on the right. X 22 (cvic, 

 160). 



