. The biology of the Protozoa. Protozoa; Protozoa. D i-v;. C~-. M% ^>^^SK Fig. 64.—Actinospharnnn eichhornii origin of centrosome from nucleus. (After Hertwi^.) synapsis and reduction. But in Boreria subcylindrica, Stevens describes the similar union of the 4 chromosomes to form 2 during the vegetative divisions and analogous conditions are evidently found in the polymastigote flagellates according to the observations of Kofoid and his collaborators. The significance of this apparent reduction in vegetative mitosis is problematical, and the subject requires further careful study (see Chapte
. The biology of the Protozoa. Protozoa; Protozoa. D i-v;. C~-. M% ^>^^SK Fig. 64.—Actinospharnnn eichhornii origin of centrosome from nucleus. (After Hertwi^.) synapsis and reduction. But in Boreria subcylindrica, Stevens describes the similar union of the 4 chromosomes to form 2 during the vegetative divisions and analogous conditions are evidently found in the polymastigote flagellates according to the observations of Kofoid and his collaborators. The significance of this apparent reduction in vegetative mitosis is problematical, and the subject requires further careful study (see Chapter XI for details of meiosis.). 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, New York, Lea & Febiger
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