400 
FOSSIL TURTLES OF NORTH AMERICA. 
the inguinal notch. 
Another peripheral is present which has the same texture and general 
appearance as the other bones, but it possibly belongs to another turtle. If pertaining to this 
skeleton it can be only the eleventh. 
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517. 518 
Fics. 516-518.—Testudo ligonia. Parts of carapace of type. X 4%. 
516. First peripheral and part of nuchal. 
nu. p, nuchal plate; nu. s, nuchal scute; per, 1, first peripheral 
517. Section of first peripheral near union with second. Upper surface toward the left. 
518. Ninth peripheral of type. 
The nuchal (fig. 516) had a length, in the median line, of about 100 mm.; a width, at the 
free border, of 70 mm.; and a maximum width of 108 mm. The greatest thickness, at the 
midline, is 21 mm. The portion occupied by the first vertebral scute stands at a distinct angle 
with that in front of it. The first peripheral has a fore-and-aft extent of 81.mm., of which 75 
mm. has been exposed on the upper surface. The thickness of the sutural border next the 
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519. 
Fics. 51 9-522.—T estudo ligonta. 
§22. 
Peripherals and epiplast of type. 4. 
519. Section of ninth peripheral, near union with eighth. 
521. Section of eleventh peripheral, near union with tenth. 
520. Supposed eleventh peripheral. 
522. Upper view of left epiplastron. 
second peripheral is 26 mm. The free borders of these bones are acute. Fig. 517 1s a section 
taken near the articulation with the second peripheral. 
The ninth peripheral (fig. 518) is high and narrow, the height being 92 mm., the width 
along the free border 24 mm. There is no flare, and the free border is acute. The greatest 
thickness, at a point 73 mm. above the free border, is 24 mm. Fig. 519 is a section taken near 
the anterior sutural border. The free edge is acute. If the remaining peripheral (fig. 520) 
