96 



Blair Bell 



The genitalia, too, showed no changes in the short period of time that 

 elapsed between the operation and the death of the animals. 



(b) Partial Removal of the Pars Anterior. — It has been mentioned 



Fio. 22a. — Dog 3, before operation. (Photograph.) 



Fiii. 22b. — Dog 3, 210 days after removal of a large piece of pars anterior. (Photograpli.) 



that complete removal of the pars anterior alone is practically impossible, 

 and that the removal of nearly all of it is usually fatal. Nevertheless it is 

 quite easy safely to remove very large (fig. 21) or small portions of the 

 anterior lobe ; consequently, observations of the effects produced by these 

 operations should be reliable. 



