RESORPTION OF CONCEPTUSES. 



297 



maceration, others of "mucoid" degeneration although they 

 still may contain vessels. Some, however, are represented by a 

 hyaline outline only. The stroma and the epithelium of many 

 of the villi are well preserved, however, and the same thing holds 

 for the chorionic membrane. The decidua shows slight general 

 and very marked local infiltration. Some remarkably dense 

 periglandular and perivascular zones of infiltration also are 



FIG. 7. External appearane of No. 1843. X 6. 



present. The mucosa, too, is infiltrated and contains islands 

 composed exclusively of round cells. Besides maceration effects, 

 many of the villi show marked changes, undoubtedly hydatiform 

 in character. In this case it is possible that we are dealing not 

 so much with absorption as with dissolution of the embryo, for 

 the digestion products of embryo, yolk sac and amnion, instead 

 of having been wholly absorbed still may be contained in the 

 fluid within the chorionic vesicle. 



Before briefly considering the evidence regarding absorption 

 offered by tubal and ovarian specimens, I wish to refer to number 

 1843. This specimen, which was donated to Stanford Uni- 



