280 'The Comparative Physiology of the Pituitary Body 



DESCRIPTION OF PLATE. 



Fig. 1. Median sagittal section through the pituitary body of the fowl — Gallus 

 domesticus. a, optic chiasma ; h, anterior lobe of the pituitary — pars glandularis ; 

 c, cells of tlie pars intermedia ; d, neck of the posterior lobe ; e, cells of the pars 

 intermedia lying behind the neck ; /, third ventricle ; g, posterior lobe of the 

 pituitary. 



Fig. 2. Median sagittal section through tlie pituitary body and saccus vasculosus 

 of the cod — Gadus morrhua. a, optic nerve ; h, anterior part of pars intermedia — 

 chromophobe cells of Sterzi; c, pars glandularis or anterior lobe — chromophil cells 

 of Sterzi ; d, pars nervosa surrounded by cells of pars intermedia — posterior lobe ; e, 

 infundibulum ; /, large ependyma cells ; g, saccus vasculosus ; h, space between lobi 

 inferiores occupied by blood-vessels and connective tissue. 



Fig. 3. Median sagittal section through pituitary body of skate — Raja batis. 

 a, optic chiasma ; h, anterior part of pituitary enclosing cavity ; c, infundi- 

 bulum ; d, opening of saccus vasculosus on either side into infundibulum ; <?, body 

 of pituitary. 



