533 



As it is traced backward (in the Figures 13, 14, 15 and 16) it be- 

 conie.s subdivided into two parts by an indentation of epithelial cells 

 in its outer (ventri- 

 cular) wall (see Figs. 

 14 and 15). There 

 can be no doubt that 

 the dorsal segment 

 of the body — from 

 its structure and 

 relations — is still 

 paraterminal : but, 

 at a first glance, 

 the identity of the 

 ventral segment is 

 not so sure, chiefly 

 for the reason that 

 there is no clear 

 line of demarcation 

 between it and the 

 corpus striatum (with 

 the tuberculum). But 

 when we reach Figure 

 16 and find that it 

 (the ventral segment) 

 behaves in the same 



Fig. 13. Another 

 section from the same 

 series, further back. The 

 pallial formation occupies 

 the position of the bulbar 

 structures in Fig. 12. Note 

 the irregular arrangement 

 of the cells of the Tuber- 

 culum olfactorium at the 

 lower edges of the hemi- 

 spheres. Section 18. 2. 2. 



Fig. 14. Section 

 near the lamina termi- 

 nalis. Same series, 19. 1. 5. 

 At the ventro - lateral 

 corner there is a comma- 

 shaped collection of cells, 

 forming the "Nucleus 

 taeniae" of Edingek. Fig. 14. 



Fig. 13. 







„**■-: 





-:J ■'»*-, 



way as the paraterminal body is known to do in other verte- 

 brates (i. e. fuses with its fellow to form the commissure-bed, which 



