PLATE 11 



EXPLANATION OF FIGURES 



Spermatogonial and somatic metaphases. 



\i From the same animal as plate 1, twelve atelomitic chromosomes. 



22a Seventeen atelomitic chromosomes. For first spermatocyte, see plate 

 4, 22. 



32a Fifteen atelomitic dyads. For rearrangement and comparison with first 

 spermatocyte, see plate 5, 32 and 32a'. 



33a Ten atelomitic chromosomes. 



38a A tetrad dividing unequally. 



62a Seven atelomitic chromosomes, the minimum number. 



626 Another complex from above individual. 



63a Eight atelomitic chromosomes. For rearrangement and comparison 

 with first spermatocyte, see plate 9, 63 and 63a'. 



70a Circotettix lobatus. Entire complex, twenty-one chromosomes. 



70d Prophase tetrad showing vesicles on one homologue. 



70e Unequal division of same tetrad in first spermatocyte metaphase. 



75 Circotettix lobatus. Entire complex, twenty-one chromosomes. 



72 Somatic complex from a female of form 'B,' ten atelomitic chromosomes. 



73 From another female of same group, eight atelomitic chromosomes. 



74 From a female of form 'A,' fourteen atelomitic chromosomes. 



514 



