. The cell in development and inheritance. Cells. A ';i-^-^:>-''--»'?5>.. Pig- 30- — Mitosis in the Flagellate .V(7t//- A. Nucleus (fi) in the early prophase; outside it the attraction-sphere [s), containing two centrosomes (Ishikawa). B. The mitotic figure; n. the nucleus, containing rod-shaped chromosomes; s. attraction-sphere; ;. ex- tra-nuclear central spindle. (Drawn by G. N. Calkins from one of his own preparations.) in the higher types, except that the nuclear membrane does not disappear. ^ Regarding the history of the chromatin the most thorough obser- vations have been mad
. The cell in development and inheritance. Cells. A ';i-^-^:>-''--»'?5>.. Pig- 30- — Mitosis in the Flagellate .V(7t//- A. Nucleus (fi) in the early prophase; outside it the attraction-sphere [s), containing two centrosomes (Ishikawa). B. The mitotic figure; n. the nucleus, containing rod-shaped chromosomes; s. attraction-sphere; ;. ex- tra-nuclear central spindle. (Drawn by G. N. Calkins from one of his own preparations.) in the higher types, except that the nuclear membrane does not disappear. ^ Regarding the history of the chromatin the most thorough obser- vations have been made by Schewiakoff in EiiglypJia and Brauer in Actuwsphcerinin. In the former case a segmented spireme arises from the resting reticulum, and long, rod-shaped chromosomes are formed, which are stated to split lengthwise as in the usual forms of mitosis. The nuclear membrane persists throughout, and the entire mitotic .AH of the essential features in this process, as described by Ishikawa, have been con- lirmed by Calkins in the Columbia laboratory. F. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York : The Macmillan company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcells, bookyear1896
