482 THE AMERICAN NATURALIST [Vol. LIII 



lectecl in reference to the inheritance of yellow. Don- 

 caster 's^ summaries from fancy breeders and from 

 Little's data are given, kittens of undetermined sex being 

 omitted. The three tortoiseshell females from one pair 

 of Doncaster's yellow by yellow may be readily explained 

 if it be supposed that the mother was an, extreme yellow 

 variant of the heterozygote Yy, comparable with my 

 cream female number 23. Anomalous black females may 

 be similarly heterozygous. Anomalous blacks and tor- 

 toiseshells are to be expected from anomalous yellow 

 females. Anomalous offspring are recorded in italics in 

 Table II. 



As regards banding, certain creams and blacks could 

 not be classified and are consequently omitted from the 

 summaries. Lined by lined have given 2 lined and 2 

 blotched. Lined by striped have given 17 lined and 2 

 striped. Lined by blotched have given 12 lined and 4 

 blotched. Striped by blotched have given 19 striped and 

 8 blotched. Blotched by blotched have given 4 blotched. 



As regards ticking, it is necessary to omit all yellows 

 and many tortoiseshells, as well as some with much white. 

 Extremely-ticked by little-ticked have given 4 extremely- 

 ticked. Extremely-ticked by black have given 4 ex- 

 tremely-ticked. Much-ticked by little-ticked have given 

 1 much-ticked and 3 little-ticked. Much-ticked by black 

 have given 2 much-ticked and 3 little-ticked. Little-ticked 

 by littlo-tickcd have given 5 little-ticked and 1 black. 

 Little-ticked by black have given 7 little-ticked. 



