NORTH AMERICAN BATRACHIA AND REPTILIA, 55 



with more or less confluent ocellated or lozenge-shaped figures, 

 which become more transverse in adult, and may wholly disap- 

 pear in old age. 



a. Strong, coarse serratures on both jaws; prominent 

 hooks at symphysis of upper. 



108. P. rugosa^ Shaw. Red-bellied Turtle. Above dusky 

 M'ith variable markings; generally with irregular bands or blotches 

 of red; below dusky or reddish; head and neck brown, with 

 obscure reddish lines. New Jersey to Virginia. 



109. P. mobllensis^ Holb. Above brown, reticulated with 

 yellow lines; below yellow, more or less blotched with black; 

 iiead and neck brown, with yellow, longitudinal lines; serratures 

 of lower jaw coarser than in upper. Florida to Texas. 



J). Lower jaw alone distinctly serrated; upper compara- 

 tively smooth; notch at its symphysis small. 



110. P. Goncinna^ LeC. Above brown, with yellowish lines, 

 which are mostly longitudinal on vertebral row of scales, trans- 

 verse or bifurcating on the costal, and concentric or transverse on 

 marginal; below yellow; neck with yellow or reddish lines. 

 Austroriparian region. 



c. Both jaws smooth. 



111. P. hieroglyphiGa, Ilolb. Hieroglyphic Turtle. Above 

 olive-brown, subdivided into spaces of various shapes, by more 

 or less concentric yellow lines; below dusky yellow; head and 

 neck dark brown with yellow lines. Middle, Western, and Gulf 

 States. 



B. Scales upon loose skin between legs and on neck; low 

 ridge on alveolar surface of upper jaw not tuberculate; vertebral 

 scales, with numerous longitudinal bands; costal scales with 

 transverse ones; marginal scales with concentric figures; in old 

 age the bands disappear; edge of marginal plates notched. 



112. P. scabra^ Linn. Rough Terrapin. Above dark 

 brown, with irregular and broken bands of yellow; head and neck 

 black, with yellow lines; throat with broader lines; carapace 

 broad, high, keeled, and covered with coarse rugosities; deeply 

 serrated behind. North Carolina to Georgia. 



113. P. troosti, Holb. Yellow-bellied Terrapin. Above 

 dusky, with a greenish tinge, and slightly motj:led; below brown- 

 ish-yellow, more or less blotched with black; head and neck 

 obscurely banded with yellowish lines; carapace not keeled, and 

 with but slight rugosities. Yalley of Mississippi to Illinois. 



