493 
40 mm long) it suddenly returns to the peritoneal cavity, but until 
recently I failed to obtain a human embryo in which the intestine is 
in the act of returning from the coelom of the cord to the peritoneal 
cavity. This important stage I have now obtained through the 
kindness of Dr. Briaas of Blackville S. C., who sent me the entire 
ovum hardened in strong alcohol with all the membranes intact. The. 
abortion had taken place 91 days after the beginning of the last 
menstrual period. 
When the chorion was opened it was found that the cavity of 
the amnion was filled with a mass of granular magma obscuring 
completely an embryo 32 mm long. Sections of the chorion and serial 
sections of the embryo indicate that the embryo must have been 
strangulated a number of days before the abortion. The walls of the 
chorion are very haemorrhagic and thickened on one side, while on 
the other they are very thin. Sections show apparently normal 
structures where the chorion is thick while there is an extensive 
leucocytic and syncytial infiltration in the thin portion. The serial 
sections of the embryo show that it must have been strangulated 
before the abortion took place. Its history also indicates this. The 
central nervous system is greatly macerated, the structure of the liver 
is disintegrated and the aorta is greatly distended. The epidermis is 
wanting at many points while at other points it appears normal. At 
the edge of the epidermis there is every appearance of regeneration 
as its border is thickened and has rounded and not ragged edges. 
The rest of the embryo appears normal. 
What interests us most at the present moment is the intestine 
of this embryo; part of it is within the peritoneal cavity and part 
within the coelom of the cord. The pathological conditions of the 
chorion and embryo probably have not interferred with the position 
of the different loops of the intestine, nor with their order in returning 
to the body. The conditions may have retarded this process. A 
reconstruction of the loops of the intestine was made by the method 
of Bory. A lateral drawing of the model with a section of the embryo 
properly superimposed is given in the figure. 
This embryo (No. LXXIX in my collection) falls between Nos. 
XLV and XXXIV as given in the earlier paper. It is gratifying to note 
that the loops again correspond with those of the other models and 
they have therefore received the same numbers. It is seen that loops 
3, 4 and 5 which are within the cord in XLV‘) are now within the 
1) See His’ Archiv, Supplementband, Tafel XXIII. 
