436 



FRANCIS M. BALDWIN. 



upon the snapping turtles in air and in water but since com- 

 parable results were obtained through these ranges it is unneces- 

 sary to cite typical protocols. 



TABLE I. 



AUGUST i. 1924. OBSERVATIONS SHOWING THE TYPICAL FLUCTUATIONS OF 

 BODY TEMPERATURES WITH ENVIRONMENTAL TEMPERATURES IN THE PAINTED 

 TURTLE. 



Body Temperature Fluctuations on Cooling. In. these experi- 

 ments twelve specimens of the painted variety ranging in weights 

 from 265 to 712 grams, and ten snappers ranging from 152 to 

 1725 grams were used. Some of the representatives of each 

 group were subjected to rapid environmental drops while in 

 others the drop was made more slowly. This procedure was 

 followed because in the preliminary observations it was noted 

 that differences in rate of cooling seemed to effect slightly the 

 body temperature fluctuations. In some cases the same indi- 

 viduals were rechecked on different days following the same 

 procedure, and while slight divergences appeared in the records, 

 the same general tendencies were apparent. Illustrating the 

 chief points concerned with the rapid cooling of the painted 

 variety data are given in Table II., which is taken from an 

 experiment performed on Aug. I, on a medium-sized (360 gms.) 

 turtle, and which is fairly typical of them all. 



This particular experiment began at nine o'clock in the morning 

 and extended over five hours, the rapid drop in environmental 

 temperature occurring during the first half hour. Although the 



