. The biology of Stentor. Stentor. 306 THE BIOLOGY OF STENTOR of Weisz (1948a, 1954). I have found, however (Tartar, 1953, i959g), that in whole cells with only one node, appearance of the regeneration primordium is very much delayed, substantiating an early remark of Popoff (1909) regarding slowness of regeneration in animals with a decreased nucleo-cytoplasmic ratio. In grafts of two animals carrying only one node the delay was greater; primor- dium formation occurred only after two days, with development. Fig. 86. Effects of marked shifts in the nucleo-cytoplasmic ratio. A. Indication of di
. The biology of Stentor. Stentor. 306 THE BIOLOGY OF STENTOR of Weisz (1948a, 1954). I have found, however (Tartar, 1953, i959g), that in whole cells with only one node, appearance of the regeneration primordium is very much delayed, substantiating an early remark of Popoff (1909) regarding slowness of regeneration in animals with a decreased nucleo-cytoplasmic ratio. In grafts of two animals carrying only one node the delay was greater; primor- dium formation occurred only after two days, with development. Fig. 86. Effects of marked shifts in the nucleo-cytoplasmic ratio. A. Indication of disturbance in hypernucleates. a: Fragment containing all the macronucleus (20 nodes) of a coeruleiis did not regenerate until one day later and then astomatously {b). c: By day 3, successful re-regeneration had occurred and specimen still had 17 to 20 nodes, d: Next day there were 10 oval or doublish nodes indicating fusion and reduction of surface, e: Specimen became sickly and died on day 5, a day earlier than demise of the enucleate cell 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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