Page:Turtles Snakes Frogs-Knobel.djvu/9

 



Length, twenty-four inches; dull blackish-brown, often covered with moss; head, large: eyes, near together, looking upwards; neck beset with warts; plates of shield with slightly embossed lines and showing ridge of backbone; hind edge of shield with large saw like teeth; lower shield, small; tail crested with horny large teeth.

Found in waters everywhere; rarely on land, except in breeding time. 

