. The biology of the protozoa. Protozoa; Protozoa. A b Fig. 217. Adelina dimidiata A. Schn. A, association of macrogametocyte and smaller microgametoeyte. B, nuclear divisions in microgametoeyte and formation < if gametic nuclei. X 1400. (From Dofiein after Shellack, Arbeit, aus d. kaiserlichen Gesundheitsamt, courtesy of J. Springer.) In place of this the sexual process resembles that of pseudo-conjuga- tion in gregarines, without, however, the formation of a gametocyst or a double set of gametes. Two gametocytes, one of which is smaller, unite as in pseudo-conjugation. The microgametoeyte
. The biology of the protozoa. Protozoa; Protozoa. A b Fig. 217. Adelina dimidiata A. Schn. A, association of macrogametocyte and smaller microgametoeyte. B, nuclear divisions in microgametoeyte and formation < if gametic nuclei. X 1400. (From Dofiein after Shellack, Arbeit, aus d. kaiserlichen Gesundheitsamt, courtesy of J. Springer.) In place of this the sexual process resembles that of pseudo-conjuga- tion in gregarines, without, however, the formation of a gametocyst or a double set of gametes. Two gametocytes, one of which is smaller, unite as in pseudo-conjugation. The microgametoeyte may rest cap-like over one pole of the macrogamete (as in Adelea), or laterally (as in Adelina, Fig. 217). The nucleus of the microgameto- eyte divides one to three times and one of the products enters the macrogamete and fuses with its nucleus. A rigid fertilization mem- brane— oocyst- as in Eimeria, is formed in species of the sub- order Adeleina, but in the sub-order Hemogregarina the oocyst is delicate and like that of Plasmodium enlarges with growth and development of the zygote. Species of Adeleina are intestinal para- sites and infection is contaminative. Ilemogregarines are blood. 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, Lea & Febiger
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