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PROCEEDINGS OF THE NATIONAL MUSEUM 



The distribution of A. lineatopus temperatures is skewed so that 

 there are fewer records (7) above the preferred body temperature 

 range (28°-31° C) than below it (14) and the total range extends only 

 1° above, but 4° below, the preferred range. 



35 ^C 



25 27 29 31 



Air Temperature 



Figure 1. — Anolis lineatopus cloacal temperatures plotted against air temperature in 

 immediate vicinity at time of capture (temperatures have been recorded to nearest 0.2 

 degree and have been rounded to nearest degree for plotting). 



Heath (1964) in his report on the temperatures of beer cans has 

 shown that body temperatiu-es above the ambient ah' temperatures do 

 not necessarily demonstrate thermoregulation. But the already 

 described relationships of body and air temperatiu-e combined with 

 the behavior patterns reported below are convincuig evidence that 

 A. lineatopus thermoregulates. 



Color change in A. lineatopus may play a role in thermoregulation. 

 Casual observation indicates that in the early morning, when A. 

 lineatopus are sunning themselves, they are darker than they are 

 during the heat of the day. Since this involves a gradual change in 



