520 C. JUDSON HERRICK 



EXPLANATION OF FIGURES 



33 to 39. Transverse sections through the brain of the same specimen shown in 

 fig. 29. X 30. 



33. Through the posterior poles of the hemispheies. The nucleus of (lie com- 

 missura hippocampi (n. c. h. I is ( he rosl ral end of the pars venl ralis ( halami. 



34. Through the rostral bonier of the habenula and superior commissure. 

 The cells marked striatum are in close relation with those of the pars magnocellu- 

 laris of the preoptic nucleus. They extend forward into the pars ventro-lateralis 

 of the hemisphere and represent a porl ion of t he primordium of t he corpus s1 datum 

 which has not been evaginated into the cerebial hemisphere. 



35. 'three sections (60 niicra ) farther back. Note the very large size of the pre- 

 optic nucleus and the moderate development of tin- pars ventralis t halami. 'The 

 rost ral t ip ol the pars dorsalis t halami and corpus geniculal urn laterale are shown. 



:}ti. Through the caudal end of the habenula. 



37. Thiough the optic chiasma. 



.". . Through (he post-optic commissure. 



39. ttirough the rostral end of the posterior commissure and hypothalamus. 



