Corrections and Clarifications

Amniotic Contraction and Embryonic Motility in the Chick Embryo

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Science  20 May 1966:
Vol. 152, Issue 3725, pp. 1046
DOI: 10.1126/science.152.3725.1046

Abstract

In the report "Amniotic contraction and embryonic motility in the chick embryo" by R. W. Oppenheim (22 April, p. 528), the second sentence of the fifth paragraph should have read, "It was implied that this motility was unaffected by exteroceptive stimulation of the embryo. This stimulation included amnion contractions, yolk-sac movements, and self-stimulation."