. The biology of the Protozoa. Protozoa; Protozoa. 294 BIOLOGY OF THE PROTOZOA brane of the parent eell (see p. 237). This method of sporula- tion is frequent in rr()t()mastio:i(la and equally common amongst these Polymastigida?. As the Diplozoa nia\' represent incompletely divided individuals, so one group of the Polymastigida are gen- erally interpreted as incompletely separated daughter cells which have arisen through somatella formation. With Janicki, Doflein, Koidzmni and others we include all such multiple forms under the Tribe Polyzoa. Each of the one hundred or more nuclei of Steph- an
. The biology of the Protozoa. Protozoa; Protozoa. 294 BIOLOGY OF THE PROTOZOA brane of the parent eell (see p. 237). This method of sporula- tion is frequent in rr()t()mastio:i(la and equally common amongst these Polymastigida?. As the Diplozoa nia\' represent incompletely divided individuals, so one group of the Polymastigida are gen- erally interpreted as incompletely separated daughter cells which have arisen through somatella formation. With Janicki, Doflein, Koidzmni and others we include all such multiple forms under the Tribe Polyzoa. Each of the one hundred or more nuclei of Steph- anonymjjha (Fig. 141) is accompanied by similar kinetic elements, flagella, blepharoplast and rhizoplast and, according to the hypoth-. FiG. 141.—Stcphanonymphn sylvcstri; with many nuclei, kinetic groups, and flagella. Rhizoplasts luiite to form the inner axial strand. (After Janicki.) esis, each complex represents a single ancestral organism (karyo- mastigont). In Calomjmpha (Fig. 49, p. 98) the nuclei are less numerous and some sets of kinetic elements are not accompanied by nuclei, such aggregates are called akaryomastigonts by Janicki. In all of these forms the rhizoplasts come together to form a distinct, unified, and sometimes huge, axial strand (Fig. 141). This axial strand is morphologically quite different from the axostA'le of mono- zoic and polyzoic forms, where, according to Kofoid, this element acts as an organ of locomotion, assisting a Trichomonas for example, in making its way through the dense mucus of its environment. In. 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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