Turtles of the Genus Pseudemys. 
81 
I 9°T\ 
bar, forking at the upper end, down the center of the first and 
second costal plates, and in having the markings on the rest 
of the shell less concentric and usually in larger pattern. 
The marginal plates have a vertical yellow bar down the cen- 
ter of each, with concentric markings between; these latter, 
however, only occur in quite small specimens, as they disap- 
pear early in life leaving only the vertical bar. Head, legs, 
and plastron colored as in concinna. Ground color of cara- 
pace dark brown, darker than in concinna. The really import- 
ant difference lies, however, in the shape of the shell, which 
is shorter and more arched than in concinna , being in fact 
more nearly the shape of that of P. scripta, to which species 
jloridana bears a superficial resemblance. The males have 
smaller heads and lower shells than the females.* The upper 
jaw is slightly, the lower jaw strongly, serrated, in all speci- 
mens that I have seen, 
The measurements of the shells of some specimens are: 
Taken. 
From. Length. Width. 
Height. 
1. 
June 20, 
1905, 
Johnston Co., N. C., 250 
197 
110 
2. 
June 30, 
1905, 
“ “ “ 222 
149 
95 
3. 
June 30, 
1905, 
“ “ “ 169 
— 
— 
4. 
May 14, 
1904, 
Baker Co., Ga., 136 
114 
57 
5. 
July 20, 
1904, 
“ “ 150 
— 
— 
I have seen no specimens of labyrinthica or hieroglyphica 
and the characters assigned to them by Dr. Baur ( loco cito ), 
are not of specific value, as they fall within the range of the 
individual variation of concinna . As labyrinthica is smaller 
than concinna and mobiliensis larger, it is quite possible it is a 
smaller! northern race of that species, just as mobiliensis 
appears to be a larger southern race. 
* According to Dr. Baur ( loco cito) jloridana does not have serrated jaws, 
qut he places it in a section of the genus with lower jaw strongly serrated, 
so the absence of serrations probably applies only to the upper jaw, where 
they are little evident. 
t Labyrinthica occurs in Tennessee and Illinois in the tributaries of the 
Mississippi. 
