Observations on Coprozoic Flagellates: Together with a Suggestion as to the Significance of the Kinetonucleus in the Binucleata . e as yet nopermanent preparations showing stages in it. The process varies to some extent, as a result, I believe, of different conditions inthe environment. The whole process is so long (it may take up to 12 or 14 hours, ifnot longer) that I have not been able to follow it all through in an individual case,though I have stayed up till 4 oclock in the morning over it, when my eyes ached so AND THE SIGNIFICANCE OF THE KINETONUCLEUS IN THE BINUCLEATA. 391 much that I
Observations on Coprozoic Flagellates: Together with a Suggestion as to the Significance of the Kinetonucleus in the Binucleata . e as yet nopermanent preparations showing stages in it. The process varies to some extent, as a result, I believe, of different conditions inthe environment. The whole process is so long (it may take up to 12 or 14 hours, ifnot longer) that I have not been able to follow it all through in an individual case,though I have stayed up till 4 oclock in the morning over it, when my eyes ached so AND THE SIGNIFICANCE OF THE KINETONUCLEUS IN THE BINUCLEATA. 391 much that I was obliged to relinquish the observation. I desire to express myindebtedness and thanks to Miss Rhodes for relieving me on many occasions in thistiring and tedious watching, not only in the case of Spiromonas but also in theobservations on other forms. I also thank my laboratory assistant, Mr. GeorgeKauffman, for similar help on several occasions. Describing first what is, I think, the more usual and perhaps more normal methodof syngamy (text-fig. E), the earliest stage I have observed is of two individuals o »?&* 5.
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