1907.] Implantation of Actively Proliferating Epithelium. 553 



somatic type are frequent among these cells, showing that they multiply 

 in situ. The giant cells, which are a striking feature of sections of the area 

 of implantation, do not resemble the giant cells of tubercular lesions, but are 





like those of myeloid sarcoma, the nuclei being placed centrally. Apart from 

 the debris which they exhibit (figs. 5 to 8), the sections recall very vividly 

 the aspect of sarcoma tissue of the round celled variety. Both the giant cells 

 and the single large mononucleated cells exhibit granular cytoplasm, which 



