ADAPTATIONS TO TROPICS AND ALTITUDES 



6 :' 



on 



I- 



< 



Cr 36 c 



h- 36 C 



Q 



O 34«c 

 CD 



32*C 



8 0°f 



100' r 



METACHIRUS 



:^ 



lO'C 



• DAY 

 O NIGHT 



/ 



/ - 105* F 



/ 



o o- 





•/ 



.../• 



•• — • 



/ 



20'C 



3 0'C 



EXTERNAL TEMPERATURE 



as a function of T 

 datus) showing ttie day-night difference 



100 F 



95' F 



-90 F 



4 0'C 



Figure 1. T as a function of T in the brown opossum ( Metachirus nudicau - 



38 



36 



34 



3?. 



30 







DASYCERCUS 

 (MARSUPIAL RAT) 



MIL 



NOON 



16 



20 



MID 



Figure 2. T in the Crest-tailed marsupial rat (D asycercus cristicauda) as 

 a function of hour of day. 



391 



