The Journal of experimental zoology . 2 3 Fig. 2 Camera drawing of an embryo (E. Tr. Ext. 12) in the stage of highmedullary folds. The heavily stippled area represents a circular piece of ecto-derm taken from an embryo previously stained in a solution of Nile blue sul-phate. This occupies the wound resulting from the extirpation of the limbmesoderm. X 10. Fig. 3 Camera drawing of the same embryo (E. Tr. Ext. 12) shown in figure2 thirty hours later, showing the position of the inserted stained disc of ectodermwith reference to the somites. X 10. the circular piece of transplanted blue ectoderm,
The Journal of experimental zoology . 2 3 Fig. 2 Camera drawing of an embryo (E. Tr. Ext. 12) in the stage of highmedullary folds. The heavily stippled area represents a circular piece of ecto-derm taken from an embryo previously stained in a solution of Nile blue sul-phate. This occupies the wound resulting from the extirpation of the limbmesoderm. X 10. Fig. 3 Camera drawing of the same embryo (E. Tr. Ext. 12) shown in figure2 thirty hours later, showing the position of the inserted stained disc of ectodermwith reference to the somites. X 10. the circular piece of transplanted blue ectoderm, which is inmarked contrast to the brownish-yellow ectoderm of the host. The position of this inserted piece of ectoderm, when develop-ment had proceeded so that the somites had become visible,served to indicate whether or not the limb rudiment had beenremoved. If the stained disc eventually came to lie just ventralto the third, fourth, and fifth somites (text fig. 3), then it couldbe said with more or less certainty that the limb ru
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectzoology
