CHANGES IN NON-PREGNANT UTERUS 97 



lymphatic and myeloid leuc;bii«a. They are especially numeious 

 daring 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. (?>) 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 



'<Erj>fc- 



J.uh„,, 



Via. 16. — Section tliioiigh poitiou nf mucosa of dog during the recuperation 

 period. (From Marshall and Jolly.) 



hd.t., Basophil cell ; I'ox., eosinophil cell ; m<iii., uiononuclear leucocyte ; 

 pnli/m., polymoi'phs ; xt/:, stroma cell. 



it is probable that this is the fate of the great m.ajority of the 

 extravasated red cor]iuscles. 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 been observed in the 

 ferret. 



If copulation has taken place, spermatozoa in great numbers may 

 l>e observed in the deeper portions of the uterine glands, as well as 

 along the edges of the uterine cavity. 



Eecuperatioa in the bitch is succeeded either hj pregnancy or 

 pseudo-pregnancy according to whether or not tlie o\a. discharged 



4 



