. The biology of the Protozoa. Protozoa; Protozoa. ^ ». Fig. 205.—Paramecium caudaturn monster, a type common at periods of old age. (After Calkins.) entiated into sporoblast capsules while others give rise to the peculiar polar capsules and the threads characteristic of these Sporozoa (p. 440). In a number of Sarcodina, as in Gregarinida, there are special morphological structures for the purpose of distributing the mature j)r()ducts of multiple division. These are frequentl\' quite complex, the elaters and capillitia of Mycetozoa for example, recalling the spore-disseminating elements of the
. The biology of the Protozoa. Protozoa; Protozoa. ^ ». Fig. 205.—Paramecium caudaturn monster, a type common at periods of old age. (After Calkins.) entiated into sporoblast capsules while others give rise to the peculiar polar capsules and the threads characteristic of these Sporozoa (p. 440). In a number of Sarcodina, as in Gregarinida, there are special morphological structures for the purpose of distributing the mature j)r()ducts of multiple division. These are frequentl\' quite complex, the elaters and capillitia of Mycetozoa for example, recalling the spore-disseminating elements of the higher plants. The life history is varied, the complications being due mainly to the forma- tion of multinucleated plasmodia by fusion of numerous multi- nucleated cells and to fruiting or spore structures which arise from the Plasmodium. According to the later observations of Jahn (1911) the Plasmodium begins as a single zygote in the form of an amoeboid cell with one nucleus. This nucleus di\ides repeatedly resulting in a multinucleated cell and plasmodia are formed by fusion of such cells. When mature the plasmodium gives rise to. 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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