Strong- Development of Color tm Feathers. 



PLATE 3. 



tv. 



d.l*f- 



mbM. 



15 



5 - CTdC^^-^"®- <*.' 



III. 



17 



tv. 



Stl.'Cl. 



(J inn. ply. 



I>ir, 



rl.pi(J. 



/"*■• 









■/f^^ 



^V 



18 



RMS. del. 



