. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI AND KINETIC ELEMENTS 89 A modification of this mode of origin of the cytoplasmic kinetic element is shown by Parapolytoma saiurna according to Jameson (1914) and by Oxyrrhis marina (Hall, 1925). In these cases the old flagella and their basal bodies are said to degenerate and dis- appear prior to, or during, nuclear division. An intranuclear endo- basal body which is concealed within an endosome during vegetative. Fig. 44.—Oxyrrhis 7})arina; details of nucleus, centriole, and paradesmose. (After Hall.) life, first divides, its daughter
. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI AND KINETIC ELEMENTS 89 A modification of this mode of origin of the cytoplasmic kinetic element is shown by Parapolytoma saiurna according to Jameson (1914) and by Oxyrrhis marina (Hall, 1925). In these cases the old flagella and their basal bodies are said to degenerate and dis- appear prior to, or during, nuclear division. An intranuclear endo- basal body which is concealed within an endosome during vegetative. Fig. 44.—Oxyrrhis 7})arina; details of nucleus, centriole, and paradesmose. (After Hall.) life, first divides, its daughter halves forming the poles of the nuclear spindle (Figs. and 44). Flagella may either grow out from the substance of the kinetic elements while the latter are still at the spindle poles, or from the endobasal body after the daughter nuclei are established. In Bodo lacertcB according to Belar the centrioles after division are taken into the daughter nuclei. Here the kinetic elements,. 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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