NORTH AMERICAN BATRACHIA AND REPTILTA. 
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 
with 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. j P. mobilensis , Holb. Above brown, reticulated with 
yellow lines; below yellow, more or less blotched with black; 
head and neck brown, with yellow, longitudinal lines; serratures 
of lower jaw coarser than in upper. Florida to Texas. 
b. Lower jaw alone distinctly serrated; upper compara- 
tively smooth; notch at its symphysis small. 
110. P. concinna , 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. 
I'll. P. hieroglyphica , Holb. Hieroglyphic Turtle. Above 
olive-brown, subdivided into spaces of various shapes, by more 
or less coneentric 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 mottled; 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. 
