EVOLUTIONAPY ASPECTS IN MAMMALS 



40 

 35 

 30 



iDEEP BODY 



<-> 25 



BASE OF TAIL 



/ > ..^- 



FOOT 



2.0-3.2° — )+t 



AIR TEMPERATURE 



, , I , . , I , , . I . . . I . . . I ■ ■ ■ I ■ ■ ' I ■ ■ ' I ■ ■ ■ I ' ' ' ' ' ' ' I ' ' ■ 

 20 40 60 80 100 140 180 220 



MINUTES 



Figure 6. The deep body and skin temperatures of an adult Setonix sp. during 

 exposure to low air temperatures. (G. A. Bartholomew, 1956). 



93 



