392 



GARY N. CALKINS AND RACHEL C. BOWLING. 



(Fig. 7). Such tangential nuclear figures are typical of the final 

 progamous division, and their products become the gamete 

 nuclei. 





FIG. 5. Detail of a spindle during the third pregametic division. Section. 

 Camera lucida. X 2650. 



In the tangential nuclei as in the earlier pregametic nuclei we 

 have seen no evidence of a prophase skein stage. Metaphase 

 stages of division are frequently found (Fig. 6) and early and late 



:-c 



v^.'"/:v j 

 ;: sB'!- %'> 



FIG. 6. Group of spindles in the metaphase stage of the last pregametic 

 division, one showing polar view of a nuclear plate. From different individuals; 

 all with 10 chromosomes. Sections. Camera lucida. X i?50- 



anaphase stages. In these the number of chromosomes is always 

 ten (Figs. 7 and 8). In the metaphase stage of the tangential 



