. The biology of the protozoa. Protozoa; Protozoa. 58 BIOLOGY OF THE PROTOZOA distinguished from other substances of the resting nucleus by their color reactions to basic and acidic dyes. Sometimes the chromo- meres or chromioles are apparently suspended in a more or less definite "linin" reticulum which is recognized as being a coagulation product of the colloidal ground substance or karyolymph. In other. Fig. 27.—Origin of macronucleus after conjugation in Uroleptus mobilis. (1) First metagamic mitosis of the amphinucleus; (2) one of the progeny of this division dividing again; (3)
. The biology of the protozoa. Protozoa; Protozoa. 58 BIOLOGY OF THE PROTOZOA distinguished from other substances of the resting nucleus by their color reactions to basic and acidic dyes. Sometimes the chromo- meres or chromioles are apparently suspended in a more or less definite "linin" reticulum which is recognized as being a coagulation product of the colloidal ground substance or karyolymph. In other. Fig. 27.—Origin of macronucleus after conjugation in Uroleptus mobilis. (1) First metagamic mitosis of the amphinucleus; (2) one of the progeny of this division dividing again; (3), (4), (5) telophase stages of second division of the amphinucleus resulting in a new macronucleus (above), and a degenerating nucleus (below); (6 to 10), stages in differentiation of the young macronucleus and disintegration and absorption of the old macronucleus; in (10) two new micronuclei are in mitosis preparatory to the first division of the ex-conjugant. (At) new macronucleus; (m) new micronuclei; (d) degenerating old macronuclei. (After Calkins.) cases they are combined with the substance "plastin" to form a clearly-defined endosome (karyosome) which, depending apparently on the relative proportions of plastin and chromatin, may or may not be visible in life. Plastin appears to be a well-defined nuclear substance and writers generally speak of it with familiar ease,. 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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