20. TESTUDLO. sul 
Synopsis of the Species. 
I. Alveolar surface of upper jaw with a longitudinal ridge at the 
symphysis, instead of a pit. 
A. Shell more than twice as long as deep; beak not hooked ; 
fore limb broadest at the extremity. 
Anterior lobe of plastron bent upwards; dis- 
tance from base of first claw to base of 
fourth toe in the hind limb equal to 
distance from base of first claw to base of 
thind "int the-tore limb 652 6.6 40% en 1. polyphemus,p. 155. 
Anterior lobe of plastron not bent ; distance 
from base of first claw to base of fourth 
equal in both fore and hind hmb...... 2. agassizu, p. 156. 
Fig. 44. 
Shell of Zestudo ibera. 
B. Shell less than twice as long as deep ; 
beak hooked; fore limb broadest at 
Uiney ell avon ie omreer bacco op obion bony 3. berlandiert, p. 166. 
