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Professor Poulton pointed out that the three families 

 differed in the details of the pattern, thus showing that small 

 features were hereditary — a very important consideration in 

 the attempt to understand the growth of a mimetic likeness. 

 In this respect these three families from the West Coast 

 supported the conclusions previously arrived at from the study 

 of Mr. Gr. F. Leigh's specimens (see Trans. Ent. Soc, 1908, 

 pp. 443-445). 



1. The "anal gap" in the sub-marginal black band of the 

 hindwing was widely open in all the males of Family I ; was 

 widely open in 6, narrower in 2, and closed in 10 males of 

 Family II ; widely open in 2, narrower in 2, and closed or 

 very nearly closed in 9 males of Family Til. 



2. The hippocoon females of Family I possessed a larger 

 white patch on the hindwing than those of II and III. This 

 effect, which tended in the direction of Eastern and South- 

 eastern forms of hippocoon — mimics of the dominicanus, Trimen, 

 form of Amauris niavius — was produced in part by the lighten- 

 ing to grey of the internervular black grouud-colour, and in part 

 by the extension outwards of the white scales into the same 

 internervular spaces. A corresponding effect was visible on 

 the under surface. The female parent also possessed a strongly 



