CHANGES IN NON-PREGNANT UTERUS 97 



lymphatic and myeloid leuciemia. They are especially numerous 

 during the recuperation period of the bitch's uterus, and it is suggested 

 that they must in some unknown way be functionally connected with 

 that process. (3) Large mononuclear leucocytes (hyaline corpuscles 

 or macrocytes), containing blood-pigment which gives the Prussian- 

 blue reaction. Since pigment formation and ingestion by leucocytes 

 are of frequent occurrence in the bitch's uterus at about this stage 



eos. 



-ft 



ttr. 



FIG. 10. Section through portion of mucosa of dog during the recuperation 

 period. (From Marshall and Jolly.) 



., Basophil cell ; ''<>.<., eosinophil cell ; m<>//., mommm-lrar leucocyte ; 

 ,., polymorphs ; xt/:, struma cell. 



it is probable that this is the fate of the great majority of the 

 extravasated red corpuscles. It is possible, however, as suggested 

 in the paper from which this account is taken, that a relatively small 

 proportion may make their way into the lymphatics, and so re-enter 

 the circulation. Pigment formation has not bcm observed in the 

 ferret. 



If copulation has taken place, spermatozoa in great numbers may 

 be observed in the deeper portions of the uterine glands, as well as 

 along the edges of the uterine cavity. 



Recuperation in the bitch is succeeded cither by pregnancy or 

 pseudo-pregnancy according to whether or not tin* ova discharged 



4 



