. The biology of the cell surface. Cytology. ⦠6 iv"^ â¢*âºâ¢ ^' â y* Fig. / 29.âHistory of the middle-piece of the spermatozoon within the egg, Echinarachnius parma. (Original.). 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 Just, Ernest Everett, 1883-1941. Philadelphia, P. Blakiston's son & co. , inc

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