Observations on Coprozoic Flagellates: Together with a Suggestion as to the Significance of the Kinetonucleus in the Binucleata . es, when it takes placewithout the slightest hesitation in fission, often after a similar drawing-out of thecytoplasm. The next stage is that the two sets of flagella come to lie nearertogether in the middle line, though there is no definite, prolonged oval stage,as in Helkesimastix. The two flagella soon appear to originate together, and thetwo posterior ones can scarcely be separated. Another point of difference is thatthe nuclear union takes place about this time
Observations on Coprozoic Flagellates: Together with a Suggestion as to the Significance of the Kinetonucleus in the Binucleata . es, when it takes placewithout the slightest hesitation in fission, often after a similar drawing-out of thecytoplasm. The next stage is that the two sets of flagella come to lie nearertogether in the middle line, though there is no definite, prolonged oval stage,as in Helkesimastix. The two flagella soon appear to originate together, and thetwo posterior ones can scarcely be separated. Another point of difference is thatthe nuclear union takes place about this time, , earlier than in of two nuclear areas, there is now only one large one (fig. C 8, also fig. 54). AND THE SIGNIFICANCE OF THE KINETONUCLEUS IN THE BINUCLEATA. 387 In this stage, which may continue for quite a long period (two or three hours), thezygote can still be irregular and semi-amoeboid. But at length it stops progressing,and gradually becomes rounded ; the flagella then cease to move, and suddenly canbe no longer seen ; they have been absorbed. How long a period elapses before JA-J. fr-ttM.
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