140 University of California Puhlications in Anatomy i^^^^- 2 



Fig. 18, Experiment V-o. This figure shows sections through the left external 

 geniculate body (left two vertical rows) and through the right external genicu- 

 late body (right two vertical rows). Anterior (oral) sections (1, 1), posterior 

 (caudal) sections {8, 8). Left sides of the figures are lateral, right sides are 

 medial, close to the thalamus. Stippled portions represent segments where 

 nerve cells degenerated; black portions, those with normal cells. In agree- 

 ment with four lesions of the striate area of the left occipital operculum 

 (fig. 17) four separate degenerated zones were found in the left external genicu- 

 late body (left 1-8, zones a, b, c, d) ; in the right external geniculate body, 

 in agreement with the two lesions of the striate area of the right occipital 

 operculum (fig. 17), two separate degenerated zones were found (right 1-8, zone 

 marked with a double cross, and with an asterisk). 



