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BENJAMIN H. PRATT AND J. A. LONG 



deeply staining granules found in the cytoplasm during the ana- 

 phase, and by the character of the chromatin in the daughter nuclei. 

 In the very young daughter nuclei, when the nuclear wall is first 

 appearing, the chromatin forms a somewhat flattened, closely- 

 packed aggregation of blocks exceedingly varied in size and shape 

 (fig. 1). No linin is evident in such nuclei. A conspicuous, very 

 elongate, spindle-shaped remnant of the interzonal fibers and 

 the zwischenkorper extends over the two adjoining margins of 

 the two daughter cells containing such nuclei. These cells may 

 be regarded as the very first stages of the primary oocytes. 



In the same ovary with these late telophase nuclei and often 

 immediately adjacent to them are other nuclei which, for the 

 following reasons, may be considered as directly derived from 

 them and as constituting the early stages of the preleptotene 

 nuclei. Although these preleptotene nuclei may he side by side 

 with the late telophase nuclei they are shghtly larger, almost 

 spherical and contain chromatin still in the form of numerous 



