( 019 ) 



coaliii;^' of lliese foetal \illi I often observed a double layer of 

 lUK'lei, viz. a layer of flattened nnelei, lyini!; close together, coating 

 the villus and, round this, a layer of round, large nuclei. Against 

 the latter layer the exti'avasated blood is found. Between the nuclei ot 

 the inner series, cell-limits are sometimes noticeable (chorionectoderm). 



Finally I want to offer a few remarks about the villi in the 

 border-seam. 



The mass of coagulated blood found near the edge of the placenta, 

 and the bulk of which has the shape of amori)hous, orange coloured 

 lumps, is mainly situated between two very long villi, running in 

 a slanting direction from the foetal surface of the j)lacenta to the 

 wall of the uterus. From these villi and from the part of the 

 chorion that is Ij'ing between the bases of the two, a number of 

 shorter villi, with ramifications, find their way into the above 

 mentioned mass. 



These villi are generall}' somewhat swollen and rounded off at 

 their extremities. They are all conspicuous by their profuse vascularity. 



The chorion between the bases of the two villi just described is 

 covered with a layer of very darkly-stained nuclei, lying very close 

 together. It remains doubtful whether this was a s^^ncytium. 



The secondary villi, passing into the cibove mass also have such 

 a coating. In some cases t^vo rows of nuclei could be seen on 

 the surface, while it seemed to me that the row of nuclei turned 

 towards the villus was not of such a dark hue as the outer one 

 turned towards the blood-mass. At the extremities of the villi the 

 nuclei are found to lie very closely together and to be more numerous. 



Both iji the protoplasm of the latter layer, covering the chorion, 

 and in that of the \illi one observes accumulations of orange- 

 coloured particles. 



Reabsorption of these corpuscles from the mass found in the border- 

 seam of the placenta is thei'efore effected by means of the coating 

 of the said layer of the chorion as well as that of the villi. 



In one or two instances I found a coloured [)article in the stroma 

 of a villus or in the capillaries miming into it. 



