. The biology of the protozoa. Protozoa; Protozoa. k \ m&\ Mm THREE SOMATIC DIVISIONS OF FERTILIZED NUCLEUS FERTILIZATION TWO CONSECUTIVE DIVISIONS GIVING FOUR NORMAL CELLS. 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 Calkins, Gary N. (Gary Nathan), b. 1869. Philadelphia, Lea & Febiger

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