. The biology of Stentor. Stentor. 226 THE BIOLOGY OF STENTOR 2. Other disarrangements of the normal cell pattern When gross parts of the stentor cell are shifted with respect to one another in operations much more simple than total mincing, the effects on form are usually far more enduring and bizarre. Original longitudinal and transverse axes are apparently retained in the large parts and fall into conflict with each other. Gruber (1885a) had shown that in stentors suffering a single cut the parts could shift upon each other to produce doublish forms, and Ishikawa (1912) produced these and l
. The biology of Stentor. Stentor. 226 THE BIOLOGY OF STENTOR 2. Other disarrangements of the normal cell pattern When gross parts of the stentor cell are shifted with respect to one another in operations much more simple than total mincing, the effects on form are usually far more enduring and bizarre. Original longitudinal and transverse axes are apparently retained in the large parts and fall into conflict with each other. Gruber (1885a) had shown that in stentors suffering a single cut the parts could shift upon each other to produce doublish forms, and Ishikawa (1912) produced these and large lateral flanges by slicing into coeruleus and holding the split parts separated for a few minutes so that they then did not heal in place. Here we shall simply offer two new cases which are typical. Figure 65A shows a coeruleus which was simply split longitu- dinally yet it never recovered the normal form before it eventually died of starvation. The other case (b) was of a stentor which had been " quartered " with the result that each fourth of the cell was maximally misplaced. Gross abnormality resulted, finally leading to the formation of a double animal. In a previously cited case the same operation produced a doublet with reversed asymmetry on. Fig. 65. Gross abnormalities of shape produced by simple shifts of large stripe areas. A. When stentor is split to tail-pole, and halves shift by contraction, healing irregularly, aberrant form is produced but later corrected. B. Anterior half rotated 180° on posterior then left half 180° on right. Quartered animal became very abnormal in shape, later converting to a telobiotic double 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 Tartar, Vance, 1911-. New York, Pergammon Press
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