MIDBRAIN AND THALAMUS OF NECTURUS 



337 



Fig. 49 Horizontal section from the same specimen as the last a little farther 

 ventrally through the commissura hippocampi {com.Mp.) and dorsal margin 

 of the nucleus preopticus {nucpo.). Regarding the varicose fibers marked tr. 

 mam.ped., see the description of figure 46. X 30 (civc, 1-2-4). 



Figs. 50 to 60 A series of parasagittal sections through the thalamus and 

 midbrain. They are taken from several specimens prepared by the Golgi 

 method. In some cases there is a slight deviation from the true parasagittal 

 plane, which is noted. The notations of the series numbers of the sections in- 

 cluded in the descriptions will enable the reader to determine which sections 

 come from the same specimen. In some of the series sections are illustrated 



