ANALYSIS OF CASES 
83 
spread out over the mass of blood enclosing the remains of the chorionic 
vesicle. The difference is accounted for by the much larger size of the 
mass of clot and tissue enclosed in the implantation sac. 
IV. Case of Thompson. 
In this case the ovary (left) was enlarged, and a dark red body 
about “the size of a horse chestnut” projected from its free margin. 
There was no adhesion of the Fallopian tube to the gland. The 
marginal swelling was somewhat separated from the ovary proper 
during the operation, but the relations of the two parts were quite 
distinct, and there was complete continuity of tissue between them. 
The red mass enclosed the chorionic vesicle which contained a normal 
embryo of 12 mm. length. The villi were for the most part in a 
state of degeneration, but on the better preserved the usual two-layered 
epithelium was readily made out. About two-thirds of the vesicle 
projected from the ovary, the remainder being imbedded in a shallow 
depression within the gland. The projecting portion of the chorion was 
covered by a thin layer of fibrous tissue, which the author calls the 
theca externa, but at no point could he recognise lutein cells. On 
the deep aspect of the excavation within the substance of the ovary, 
there was well preserved corpus luteum tissue, which extended to the 
edge of the thin fibrous sac above mentioned. The villi and masses 
of trophoblast on the deep aspect of the vesicle were attached to 
ovarian tissue, while masses of plasmodium were seen lying in 
contact with the theca interna. Nothing resembling decidua was seen. 
The author regarded the ovum as having developed partly within and 
partly without the ovary. 
V.—The Case of Hewetson and Jordan- Lloyd. 
These authors describe a specimen which, in its relation to the 
corpus luteum differs somewhat from the preceding. The chorionic 
vesicle was found lying in a mass of firm blood clot in the pouch of 
