ON THE METHOD OF CELL DIVISION IN TÆNIA

1. Amitosis has not been found to occur in the oögenesis of the cestodes studied. 2. All observations on the process of oögenesis point to mitosis as the usual method of cell division. 3. The presence of a "Nebendotter" which has peculiar staining properties gives a misleading appearance of amitosis. 4. Maturation is of the typical form. 5. Indirect evidence strongly suggests that physiological factors influence the frequency of mitotic divisions. 6. Nuclear divisions are not always followed immediately by cell division. 7. Only negative evidence as to the method of division in somatic structures has been found ; there is no satisfactory evidence of amitosis and mitosis is not abundant. 8. Rapidity of growth in the somatic tissues of the cestodes body does not necessarily postulate many division figures.