20 



EVOLUTION AND AN'IMAL LIFE 



TrG. 9.- -Blunt-nosed salamander, Amhlystoma opacum. (Photograph by W. H. Fisher.) 



Fig. 10. — White pelicans, Pelecanus erythrorhynchus, and whooping-crane, Grus ameri- 



cana. (Photograph by W. H. Fisher.) 



