REPTILES OF ALL LANDS 621 
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BALL PYTHON (Python regis): AFRICA 
This small python seldom attains a length of over five feet. It receives the name from a 
habit of coiling up into a veritable ball. Photo by Raymond L. Ditmars 
RAT SNAKE (Coluber emoryi) : SOUTHERN UNITED STATES 
This serpent receives its name from its habit of preying largely upon rodents. A great 
number of the snakes are thus of economic value, but a foolish prejudice is rapidly extermi- 
nating some of the most useful specimens (see pages 620 and 623). Photo by Raymond L. 
Ditmars. 
