278 



ZOOLOGY 



FIG. 2(51. Crotalus, the rattlesnake. Photographed as the snake was about 

 to strike. Taken in Arizona and kindly lent by H. W. Menke, Chicago, 111 



FIG. 262. The rattlesnake. The recoil after striking. Photographed 

 Arizona and kindly lent by H. W. Menke. 



Note in both figures the elevated rattle, toward the right. 



