PLATE 7 



EXPLANATION OF FIGURES 



55 to 65 From Mermiria bivittata. 



55 First spermatocyte metaphase showing the multiple and the five smaller 

 chromosomes divided. 



56 Three multiples of first spermatocyte metaphase. 



57 Like figure 56. 



58 Three multiples of the 'green' variety of M. bivittata in which fiber 

 attachment is almost at the end of the bent portion. At a complete separation, 

 in b and c beginning stages. 



59 Similar to figure 58. Note the various constrictions, simulating a decad 

 constitution, emphasized at a by separation at two levels. 



60 Complete separation of bent rod opposite accessory chromosome. 



61 Polar view of second spermatocyte metaphase. 



62 Lateral view of same stage. 



63 to 65 Polar view of second spermatocyte metaphase. All have eleven 

 chromosomes, one of which is a V, but in one case, figure 63, this is a simple 

 chromosome and in the other, figure 64, it is a multiple involving the accessory 

 chromosome.. 



602 



