186 



ANIMAL BIOLOGY 



141. Suggestions for the study of the turtle. Turtles are easily 

 kept at home or in the laboratory. The pupil should verify the 



FIG. 134. Lizard of the Southwest (commonly known as the "horned 



1 toad"). 



statements given above concerning the turtle, and should then write 

 an account of his observations in his notebook ; or a well-labeled 

 drawing will cover most of the ground. The pupil should also ob- 

 serve and describe in his notebook the methods by which the turtle 



feeds, crawls, swims, and 

 protects its head, legs, and 

 tail. 



142. Relatives of the 

 turtle. Animals related 

 to the turtle are the lizards 

 (Fig. 134), alligators and 

 crocodiles, and snakes (Fig. 

 135), all of these animals 

 being known as reptiles. 

 None of the reptiles, other 

 than the turtles, possess a 

 shell, but all are covered 

 with scales, and have toes 

 armed with claws, except 



FIG. 135. The rattlesnake. 



