. Senescence and rejuvenescence. Age; Reproduction. THE GAMETES IN PLANTS AND ANIMALS 345 genie, male-producing, and the zygogenic, female-producing, eggs have, so far as I am aware, been described. But the morphological differences in the daphnids and plant lice are evidently extreme,. 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 Child, Charles Manning, 1869-1954. Chicago, Ill. , The University of Chicago Press

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