. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . orion. Reduced one-third. they come in contact with fresh blood and are necrotic else-where. At no point does the syncytium invade the walls ofthe chorion. It is impossible to interpret this specimen without admittingthat the chorion continued to grow after the ovum had col-lapsed. No. 87. Ovum, 24 x 16x9 mm.; embryo, C. R., 4 mm. Dr. Cole, Peru, 111. The last period took place April 15, 1896. On May 15the woman had a slight flow which repeated itself every fewd
. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . orion. Reduced one-third. they come in contact with fresh blood and are necrotic else-where. At no point does the syncytium invade the walls ofthe chorion. It is impossible to interpret this specimen without admittingthat the chorion continued to grow after the ovum had col-lapsed. No. 87. Ovum, 24 x 16x9 mm.; embryo, C. R., 4 mm. Dr. Cole, Peru, 111. The last period took place April 15, 1896. On May 15the woman had a slight flow which repeated itself every fewdays until the 27th, when the abortion took place. The daybefore the abortion the woman worked very hard. The lower end of the embryo looks atrophic and on theopposite side of the ovum there is a vesicle mm. in diam-eter. Both the embryo and vesicle with pieces of the adjacentchorion were cut into serial sections. The embryo proved to be a normal specimen about 21 daysold, with normal umbilical vesicle and so on. The vesicle onthe opposite side of the coelom appears to be anything but an No. i.] ORIGIN OF HUMAN MONSTERS. 179. Fig. 87a.—Additional vesicle on the side of the ovum opposite the em-bryo. Enlarged 2 times. umbilical vesicle. It lies free in the cavity of the coelom im-bedded within the magma, and is in no way torn. It is com-posed of three distinct layers: a thick middle layer, in whichare numerous blood islands, an epithelial lining layer, and anoutside layer, which does not completely cover the one side of the vesicle there is a sharp invagination of allthree layers, which projects well into the vesicle. The meso-derm of this invagination has also within it several bloodislands. The chorion is normal in appearance, with blood-vesselsentering it from the normal embryo.
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