. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 37c.—Section through the umbilical cord, vesicle and the 10 Fig. 37d.—Section through the attachment of the umbilical cord andvesicle to the chorion. X 10 times. No. i.] ORIGIN OF HUMAN MONSTERS. 163 system. The mesodermal tissues are characteristic and theform of the pharynx and lower jaw is recognizable. Fromthis region the two branchial arteries pass into the cord, asthe figures show. A single vein, however, passes from, thecord directl
. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 37c.—Section through the umbilical cord, vesicle and the 10 Fig. 37d.—Section through the attachment of the umbilical cord andvesicle to the chorion. X 10 times. No. i.] ORIGIN OF HUMAN MONSTERS. 163 system. The mesodermal tissues are characteristic and theform of the pharynx and lower jaw is recognizable. Fromthis region the two branchial arteries pass into the cord, asthe figures show. A single vein, however, passes from, thecord directly into the center of the body and ends just belowthe lower jaw. There is no heart, liver, myotomes, nor lowerend of the body, these being replaced by the cord. The ar-teries are empty and the vein is distended with blood. No. 54. Embryo, C. R., 11 mm. From Dr. McMorris, Belle Plaine, Iowa. The embryo alone was given me. It shows an atrophichead, but otherwise appears like a normal embryo of 4^2weeks. In the sections it is seen that the central nervous system issolid with the exception of the mid-brain, whose ventricle stillcommunicates with the exterior of the body through an openneuropore. The head is atro
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