PLATE 2 



EXPLANATION OF FIGURES 



8 to 14 Complexes involved in mating number 5. 



8 First spermatocyte complex of father. 



9 Somatic complex of mother; complex in two sections, two chromosomes 

 cut (columns 10 and 11). 



10 to 14 First spermatocyte complexes of four sons, 13 and 14 are complexes 

 from the same individual; in 13 the octad multiple (no. 11) is partially disasso- 

 ciated at one end, in 14 it is completely disassociated, the comfponent tetrads 

 being shown as no. 3 and no. 11. Note that the three tetrads nos. 1, 7 and 8 

 are of similar form in both parents and that there is no variation from the par- 

 ental forms of these chromosomes in the offspring. Tetrad no. 7, row 12, had 

 opened with the long instead of the short arms free. 



476 



