REGENERATION IN MNEMIOPSIS LEIDYI, AGASSIZ

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Abstract
Specimens of Mnemiopsis were cut through the body in various planes to produce halves, thirds, fourths, and eighths. The objective of the experiments was to see what portions of the animal would regenerate lost parts. Halves, thirds, and fourths of this animal regenerated the lost parts, but the eighths failed to regenerate. The organs formed in sequence during regeneration were the apical organ, rows of plates, and plates on these rows. Some of the halves and fourths failed to regenerate rows, rounded up with the original four rows and behaved as normal animals. Certain evidences show the apical organ to be the regulating center of this animal during regeneration.

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