Normal Plates of the Development of Necturus Maculosus (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Normal Plates of the Development of Necturus Maculosus

Dorso-lateral view of embryo 20 days 10 hrs. Old, length 6 mm, 6 pairs of myotomes. Outline of body conforms to curvature of egg. Head end of embryo shows three longitudinal ridges; middle ridge lies slightly above level of lateral ridges. The middle one is common anlage of fore, mid and hind brain.

The lateral ones are the common anlage of the optic vesicles and branchial arches. Anus formed.

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