198 VERTEBRATES. 



Each student should make a series of outline drawings, 

 illustrating the life history of the frog. 



The frog is a representative of the group Batrachia, of 

 which tree frogs, toads, newts, efts, and salamanders are 

 also members. 



THE TURTLE. 



Haunts and Habits. The pond turtles or mud turtles 

 (Pseudemys and Chrysemys), so abundant in our small 

 inland lakes and sluggish streams, are recommended for 

 study. In some places remote from water, the common 



MUD TURTLE (Chrysemys picta). 



box turtle (Cistudo) will be more easily obtainable. It 

 is very often picked up in dry wood or fields. 



The pond turtles are very shy, and somewhat difficult 

 to secure alive by ordinary methods. They clamber out 

 of the water upon the trunks of fallen trees along the 

 banks of secluded ponds and streams, and lie in the sun 

 for hours at a time, often scores of them together, of 

 all ages and sizes ; but when they are approached, they 

 tumble precipitately back into the water, and disappear. 

 They may be bought from fishermen. They may be 

 dredged or raked up from the bottom with a large rake 

 used from a boat. They may be caught with hook and 

 line, but a stout line will be necessary. A small, compact 

 piece of meat should be used for bait. A supply of speci- 



