. The biology of the Protozoa. Protozoa; Protozoa. 60 BIOLOGY OF THE PROTOZOA structures. After treatment with beef broth the body of Dileptus is enormously distended due to the swelhng of these cytoendosomes (Fig. 24). The centrally placed intranuclear body is generally described under the name karyosome, a term which has been so widely used by students of the Protozoa and for so many obviously different structures that it is practically synonymous with endosome or Binnenkorper. Thus Minchin describes it as a combination of chro- matin and plastin; Doflein defines a karyosome as a centrally p
. The biology of the Protozoa. Protozoa; Protozoa. 60 BIOLOGY OF THE PROTOZOA structures. After treatment with beef broth the body of Dileptus is enormously distended due to the swelhng of these cytoendosomes (Fig. 24). The centrally placed intranuclear body is generally described under the name karyosome, a term which has been so widely used by students of the Protozoa and for so many obviously different structures that it is practically synonymous with endosome or Binnenkorper. Thus Minchin describes it as a combination of chro- matin and plastin; Doflein defines a karyosome as a centrally placed, sharply outlined and constant constituent of the nucleus, which may contain no chromatin or may be a combination of other substances with chromatin and which divides during nuclear division, to form B. 'â ^!i.\,â s Fig. 23.â^4, Endamceha intestinalis; (e) endosome; (c) cortex of chromatin; B, nucleus and "sphere" (s) of A''odiZ?^ca ww^tarts with multiple endosomes. (Original.) two corresponding daughter structures (Doflein, 1916, p. 22), Hartmann's (1911) definition is more limited, a karyosome in his use of the term being an endosome (Binnenkorper) containing a centriole. Belar (1921) finds a "karyosome" in CJdamydophrys minor which breaks up and disappears forming neither chromatin nor kinetic elements. If we attempt to combine these different views into a common definition we find that a karyosome may be an intranuclear body which may consist of plastin alone; or kinetic element alone; or chromatin together with plastin; or a combination of chromatin with kinetic elements; or a combination of chromatin, plastin, and kinetic elements. Such a definition obviously would fail to specify any particularly nuclear structure and so far as its. 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
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