228 Proceedings of hidimia Academy of Science 



anaphase and later the whole mass is drawn out into the characteristic 

 strand shown in figure 21. Later anaphase show that these lagging 

 chromosome groups finally divide unequally and pass to the poles losing 

 their identity in the condensed mass of chromosomes of the late anaphase 

 (fig. 29). 



The above explanation of the lagging chromosomes is not offered 

 to explain a condition of similar appearance found in other forms but 

 applies only to Anisolabis annideipes. The writer does not oflFer the 

 suggestion to explain the presence of two lagging chromosomes which 



.V*. 



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FiKS. 13-28. (1:) and 14), Metaphase iiolar view showing 1- chromosomes; (15 

 and 16), same showinR 11! chromosomes: (17 and 18), side views showing small univalent; 

 (19 and 20), side views of unequal pair; (21, 22, 23 and 24), side views of anaphase 

 with lasKing chiomosomes ; (25 and 26), division of laKuinsi chromosomes; (27 and 28), 

 serial section of a cell in later anaphase .showing bilobcd chromosome. 



are only very rarely found in this species. Since the few cells with 

 two lagging chiomosomes seemed to degenerate in late anaphase the 

 writer concludes that these cells fail to complete the maturation divisions. 

 Following the first spermatocyte division the nucleus passes through 

 a short rest period before the second spermatocyte division (figs. 30, 

 31). A careful study of the nucleus from anaphase of the first to the 

 metaphase of the second spermatocyte divisions was made. During the 

 condensed appearance in the late anaphase the chromosomes could not 

 be traced (fig. 29). In the reorganization of the nucleus the chromosomes 

 separate and remain as distinct bodies distributed through the nucleus 

 until the prophase of the second spermatocyte division. After this 



