. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . which the age ofthe specimen could be estimated. Part of the specimen hadbeen cut into sections before the specimen was sent with thestatement that no embryo had been found, it having fallen out. I found that the half sent contained a ccelom, 3 x with magma, in which there was a cavity about x 1mm. Sections showed that the cavity was natural and notsharply defined, without anything to indicate that an embryohad been in it. On the contrary, it w


. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . which the age ofthe specimen could be estimated. Part of the specimen hadbeen cut into sections before the specimen was sent with thestatement that no embryo had been found, it having fallen out. I found that the half sent contained a ccelom, 3 x with magma, in which there was a cavity about x 1mm. Sections showed that the cavity was natural and notsharply defined, without anything to indicate that an embryohad been in it. On the contrary, it was found that the magmareticule was filled with a loose net-work of mesoderm cells,which bound one side of the chorion with the other, as indi-cated in the diagram which is from a reconstruction. Thesecells are directly continuous with those of the mesoderm andresemble them in every particular. At one point there is asmall group of epithelial cells, which may represent what wasoriginally the embryo. Otherwise the chorion and its villi are normal in appear-ance, being encapsulated in decidua which has in it some MALL. [Vol. No. ORIGIN OF HUMAN MONSTERS. 27 \


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