. The eggs of mammals. Ovum; Embryology -- Mammals; Mammals -- physiology; Ovum. This Book Is Dedicated to W. E. Castle and W. J. Crazier. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pincus, Gregory, 1903-1967. New York, The Macmillan Company

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