. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI AND KINETIC ELEMENTS 63 in the form of more or less regular chromomeres uniformly dis- tributed in the nuclear space (Euglena type, Fig. 25), or more or less compactly aggregated about the kinetic element (many species of Endamoeba, various flagellates, Coccidia and Myxosporidia, etc.). Or, finally, the chromatin may be in the form of relatively large granules collected in a zone just within the nuclear membrane {e. g., Pelomyxa), or in fine granular form may make up the chief part of the nuclear membrane {Vahlkampfia Umax, Fig. 26).. F
. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI AND KINETIC ELEMENTS 63 in the form of more or less regular chromomeres uniformly dis- tributed in the nuclear space (Euglena type, Fig. 25), or more or less compactly aggregated about the kinetic element (many species of Endamoeba, various flagellates, Coccidia and Myxosporidia, etc.). Or, finally, the chromatin may be in the form of relatively large granules collected in a zone just within the nuclear membrane {e. g., Pelomyxa), or in fine granular form may make up the chief part of the nuclear membrane {Vahlkampfia Umax, Fig. 26).. Fig. 26.—Division of ama-ba. -4. to /, successive stages in division (promitosis) of Vahlkampfia Umax; J to L, mitosis in Endamceba coli. (Original.) A peculiar and most unusual type of vesicular nucleus is present in Nodiluca viiliaris and has the superficial appearance of a massive nucleus. Two distinct types of structure have been described, one by Doflein, the other by Calkins, and the descriptions differ so widely that it is difficult to recognize them as pertaining to the same organism. According to Doflein, the nucleus belongs to the massive. 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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Keywords: ., bookauthorcalkinsgaryngarynatha, bookcentury1900, bookdecade1920
