BEDROCK 



paper shows how the problem has been solved by Nature. Taking 

 the same Uganda Model, Planema macarista, I might, by describing 

 all its Mimics, have produced a far more vivid impression of what 

 Mimicry can achieve. I might have emphasized the initial stage 

 by dwelling on the least perfect Mimic, or the minute and detailed 

 likeness of the final result by speaking of the most perfect. But for 

 the purpose in hand it was better to choose a species in which a 

 strong mimetic likeness has been produced, while at the same time 

 the initial stage may still be found persisting in certain rare indivi- 

 duals. I have attempted to show that the mimetic female of 

 Acrcea alciope is an unexplained coincidence under Bergson's hypo- 

 thesis, but receives a reasonable interpretation under Darwin's. 

 Although but a single case, it is in all essential respects typical of 

 mimetic resemblance in general ; and the hypothesis that explains 

 mimetic resemblance explains evolution. 



BBADBUBY, AGNEW, & CO LP., PBINTERB, LONDON AND TONBBIDGE. 



