Trsp.t+trrsp.th, 



Fig. 35 Through the caudal part of the tectum mesencephali and the nucleus 

 posterior tecti {nuc.p.t.}; of. figure 14. In the latter nucleus is a tangential neu- 

 ron of the stratum album, and in the motor tegmentum is a similar neuron whose 

 cell body lies among the bundles of the ventral tegmental fascicles (J.v.t.). X 

 74 (eve, 3-5-7). 



Figs. 36 to 47 Drawings of selected sections from a horizontal series through 

 the thalamus and midbrain. Golgi method. The right side is slightly farther 

 ventral than the left. 



Fig. 36 Through the dorsal part of the tectum mesencephali, including the 

 nucleus posterior tecti. The relations of the neuropil of the optic part of the 

 tectum {col. sup.) and the coUiculus inferior {col.inf.) are shown. The most lat- 

 eral fibers of the tractus tecto-thalamicus et hypothalamicus cruciatus posterior 

 {tr.t.th.h.c.p.) are seen to be related to the nucleus posterior tecti (nuc.p.t.). 

 Sections immediately vent rally show very long dendrites of the nucleus posterior 

 tecti reaching far forward on the lateral surface and arborizing among the fibers 

 of this tract. X 30 (cvc, 3-5-7). 



Fig. 37 Three sections ventrally of the preceding. The habenulae lie in the 

 plane of section farther forward, but are not drawn. On the right side is a dense 

 neuropil in the regions marked col. sup. and col.inf., the details of which are not 

 drawn in. On the left side two widely branched free endings of fibers of the 

 tractus tecto-thalamicus et hypothalamicus cruciatus posterior (tr.t.th.c.p.) are 



324 



