THE PITUITARY BODY 



gists (Kingsbury, Haller, and others), the development of 

 Rathke's pouch and the infundibular process of the dien- 



G. 8 mm 



Fig. I. — The development of the pituitary of the cat in relation to the number 

 of mitoses in the floor of the diencephalon (Gilbert, 1934). Each mitotic figure is 

 indicated by a dot. The dotted lines of // inclose the area shown in the other figures. 

 an, anterior neuropore; bl, buccal lobe; cp, chiasmatic plate;/i^, forebrain ;/_§■, fore- 

 gut; ha, hypophysial angle; hb, hindbrain; in, infundibular region; mb, midbrain; ne, 

 neuro-ectodermal plate; nl, neural lobe; om, oral membrane; op, optic vtg\or\, pma, 

 premammillary region; po, post-optic lamina; r/), Rathke's pouch. 



cephalon cannot be described as if these were isolated struc- 

 tures, but must be considered from the standpoint of the em- 

 bryology of the entire region of the head. Among the more 



