ADAPTATIONS TO DESERTS 



20. Scholander, P. F. 1955. Evolution of climatic adaptation in 



homeotherms. Evolution 9:15-26. 



21. Scholander, P. F., R. Hock, V.Walters, and L. Irving. 1950. 



Adaptation to cold in arctic and tropical mammals and birds 

 in relation to body temperature, insulation, and basal met- 

 abolic rate. Biol. Bull. 99:259-271. 



22. Tucker, Vance. 1961. MS. 



447 



