PLATE 80 



Head, eyes, and naked periobital areas of Columba guinea (mutant and normal) and of other 



Cdumba. Natural size. Colored photographs, Mar. and Apr. 1910. 



A. C. guinea, normal (19), adult. 



B. C. guinea, same as above. Pupil as seen in sun. 



C. C. guinea, mutant (20) adult. 



D. Colored photograph of head and neck of C. evergrmanni. Natural size. 



E. C. domestica. 



F. C. leuconota. 



Todadel., June 1910. 



Toda del. , June 1910. 





