THE BRAIN 



169 



ChTrJnf Hyp 



FIG. 139. BRAIX OF Hatteria punctata. (A, dorsal ; B, ventral ; and C, 

 lateral view.) 



VH, MH, HH, NH, as in Fig. 138 ; Med, spinal cord ; I-XII, cranial nerves ; 

 Lp, process of the hemisphere representing a hippocampal lobe ; N.opt, 

 optic nerve ; Ch, optic chiasma ; Tr, optic tract ; Jiif, infundibulum ; Hyp, 

 hypophysis ; G.p, pineal body, shown in C continuous with the parietal eye 

 (Pa), and only indicated diagrammatically in A ; J? 1 , curved ridge at the 

 base of the optic lobe ; h, small elevation in front of the cer-ebellum. 



