218 



COMPARATIVE ANATOMY 



-Sol B 



rar- 



&p 



vi r 



CkTrJnf ILyp VJf 



Fid. 166. BRAIN OF Hatteria, punctata. A, dorsal ; B, ventral ; and C, 



lateral view. 



Bol, olfactory bulb ; Ch, optic chiasma ; GHS, cerebral peduncles ; G.p, pineal 

 body, shown in C continuous with the parietal eye (Pa}, and only indicated 

 diagrammatically in A ; h, small elevation in front of the cerebellum ; HH, 

 cerebellum ; Hyp, hypophysis ; //, infundibulum ; Lp, process of the hemi- 

 sphere representing a hippocampal lobe ; between Lp and GHS is a deep groove 

 (fovea limbica) between the olfactory lobe and pallium ; Med, spinal cord ; 

 MH, optic lobes ; NH, medulla oblongata ; Nopt, optic nerve ; R 1 , curved 

 ridge at the base of the optic lobe ; Tr, optic tract ; VH, cerebral hemi- 

 spheres ; I-XII, cerebral nerves. 



