712 E. V. COWDEY 



to select animals exhibiting many stages in the closure of this connection. 



The parp intermedia surrounds the pars nervosa to a variable extent 



almost completely in the cat and scarcely at all in the sheep. In man and 



several other animals the pars intermedia "is most abundant around the 



Pars anterior 

 propria 



JnteTglandular 

 deft 



Pars intermedia. 



Pars nervosa 



4. Section through a sheep's hypophysis (magnification 400). 



neck of the posterior lobe and spreads over and onto the adjacent surface 

 of the brain" (Lewis). It is questionable, however, whether this is really 

 pars intermedia or pars tuberalis. In position the tissue corresponds to 

 the pars tuberalis which has recently been described in many representative 

 vertebrates as a distinct and separate division of the hypophysis; but, 

 according to Atwell, the pars tuberalis in the rabbit is developed from 



