THE DISTRIBUTION OF VARIANTS IN NATURE 107 



Fig. 1 1. — Distribution of Buarremon brunneinuchus (i) and B. inortiatus (2). 



(From Chapman, 1923.) 



of the species of Dicrostonyx (Hinton, 1926, p. 148 and foil.) 

 should be noted. Grinnell (191 8, p. 241) points out that, 



