20 EVOLUTION AND ANIMAL LIFE 



FIG. 9. Blunt-nosed salamander, Amblystoma opacum. (Photograph by W. K. Fisher.) 



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

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



