. Evolution and disease . known as. double DICHOTOMY. 5 monsters, and endeavour to sliow that they arise fromdichotomy, partial or complete, of the trunk-axis of theembryo. Before describing actual specimens it will bewell to adduce facts in support of the view that doubleembryos may arise from a single ovum. In 1869 Haeckel ^ showed that it was possible, by^.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectabnormalitieshuman