. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 399.—External form of the embryo. X 8 times. wise strong and healthy. The pelvic organs are normal. Thelast period occurred during the first week in September andthe abortion followed October 9, 1906. 36o MALL. [Vol. XIX. The external form looks much like that of a chick. Sec-tions show that the tissues are generally dissociated and alsomacerated. No. 400. Embryo, mm. long. Dr. Kaumheimer, Milwaukee, Wis. Bardeen Collection. Last menstruation October 21
. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 399.—External form of the embryo. X 8 times. wise strong and healthy. The pelvic organs are normal. Thelast period occurred during the first week in September andthe abortion followed October 9, 1906. 36o MALL. [Vol. XIX. The external form looks much like that of a chick. Sec-tions show that the tissues are generally dissociated and alsomacerated. No. 400. Embryo, mm. long. Dr. Kaumheimer, Milwaukee, Wis. Bardeen Collection. Last menstruation October 21; abortion December in 10 per cent formalin an hour after the abortion. The external form is that of a normal embryo, but thesections show that marked pathological changes have takenplace. The central nervous system is distended and partly. Fig. 400.—Drawing of the embryo. X 8 times. filled with round cells. The walls of the brain of the embryoare dissociated and apparently are giving rise to the numer-ous round and fragmented cells which are present. The heartand large blood-vessels are distended and well filled withblood. The tissues of the mesoderm are generally filled withround cells as well as with numerous fragmented nuclei, theinfiltration including the myotomes and the peritoneal amnion and epidermis are intact. No. 401. Embryo, mm. long. Dr. Hay. Bardeen Collection. Much of the chorion and many of the villi and the syn-cytium are necrotic and infiltrated with many leucocytes. Thetissues of the embryo are dissociated, macerated and infiltrated No. i.] ORIGIN OF HUMAN MONSTERS. 361 with round cells. However, all of the organs are recog-nizable. The umbilical vesicle is necrotic and filled with amass of broken-down cells. No. 402. Ovum, 40 x 25 x 20 mm.; embryo, 4 mm. long. Dr. OShaughnessy, New Ca
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