. The biology of the protozoa. Protozoa; Protozoa. 320 BIOLOGY OF THE PROTOZOA 2 3. 19 -'&B&'. mm 3fe 20 Fig. 162.—Oxytricha fallax; conjugation and meiosis. 2 to 9, formation and divi- sion of the first meiotic nuclear spindle and separation of the twenty-four dumb-bells into two groups of twelve dumb-bells each; 10 to 12, the second meiotic division; 13 to 15, the third division; 1G, one of the pronuclei; 17 to 20, the first zygotic division. (After Gregory.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
. The biology of the protozoa. Protozoa; Protozoa. 320 BIOLOGY OF THE PROTOZOA 2 3. 19 -'&B&'. mm 3fe 20 Fig. 162.—Oxytricha fallax; conjugation and meiosis. 2 to 9, formation and divi- sion of the first meiotic nuclear spindle and separation of the twenty-four dumb-bells into two groups of twelve dumb-bells each; 10 to 12, the second meiotic division; 13 to 15, the third division; 1G, one of the pronuclei; 17 to 20, the first zygotic division. (After Gregory.). 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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