Plate 13 



FAMILY CHELVDID.E 



AFKICAN MUU TURTLE AND AUSTRALIAN SNAKE- 

 NECKED TURTLE 



The shells are seen from beneath. Note how the members of the 

 Superfamily Plcurudira bend the neck in proteeting the head. 



SOUTH AMERICAN SNAKE-NECKED TURTLE 



Hijdromcdusa feet if era. 

 The shell of an adult is about six inches long. 



