. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 341c.—The twin embryos. Nearly two diameters. No. i.] ORIGIN OF HUMAN MONSTERS. 329. 3o u h 330 MALL. [Vol. XIX. to the chorion. These dilatations show the usual mucoidchanges, with cavity formation. The embryos are disso-ciated and macerated. The large blood-vessels are filled withblood, and it appears as if the migrating cells had infiltratedmuch of the tissues. No. 342. Ovum, 30 x 20 x 20 mm.; pedicle within, 5x1 mm. Professor Minot. The specimen is from


. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 341c.—The twin embryos. Nearly two diameters. No. i.] ORIGIN OF HUMAN MONSTERS. 329. 3o u h 330 MALL. [Vol. XIX. to the chorion. These dilatations show the usual mucoidchanges, with cavity formation. The embryos are disso-ciated and macerated. The large blood-vessels are filled withblood, and it appears as if the migrating cells had infiltratedmuch of the tissues. No. 342. Ovum, 30 x 20 x 20 mm.; pedicle within, 5x1 mm. Professor Minot. The specimen is from a tubal pregnancy and has a verythin fibrous chorion, with traces of blood-vessels, and is prac-tically without villi. Within there is a thickened fibrous


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