308 



THEOPHILUS S. PAINTER 



The double-odd chromosome has been reported for other 

 vertebrates (man, pig) and for a number of invertebrates. 

 Wilson ('09) has reported this condition for Syromastes margina- 

 tus; Morgan ('15) describes it for certain Phylloxerans; Wallace 

 ('05) and Painter ('14) found it in spiders; Goldsmith ('19) 



TABLE 1 



reports it for Cicindelidae ; Wieman ('10) found it in certain 

 beetles; Guyer ('10) describes it for man, and Wodsedalek ('13) 

 for the pig. 



A point of considerable interest is a comparison of the sex- 

 chromosomes, as I have found them in lizards, with similar 

 bodies reported for other vertebrates. In table 1, the following 



