103 



MO. The shell skull and |x-lvis of the American Box Tortoise (Cittado daiua), with 

 the plastron separated from the carapace, showing its moveable joint, and the 

 second and third vertebral and first costal scutes removed from the carapace. 



MM. Brit. 



1000. The carapace, with the hinder part of the plastron, the cervical vertebra-, sca- 

 pular and i>clvic arches, and the bones of the extremities, of the American 

 Box Tortoise (Cigfm/o clamia). 



In the carpus the two parts of the scaphoid hare coalesced, and there ii a distinct pisi- 

 forme, together with the lunare and cuneiforme, in the proximal row. The distal row con- 

 sists of five bones, the unoiforme being divided as usual in the Ckelonia. The pollrx and the 

 two outer digits hare each two phalanges ; the index and modi us have each three phalange* ; 

 the last phalanx supports a claw on each digit. In the hind-foot the rudimental ralcaneum 

 has coalesced with the astragalo-scaphoides. The digits decrease in strength from the first 

 to the fifth, and in length from the second to the fifth. The hallux has two phalanges ; the 

 next three digits have each three phalanges ; there is barely a rudiment of a second claw lew 

 phalanx upon the fifth digit. 



/fun(erian. 



1001. The shell of the American Box Tortoise (Cintiido dawm), showing the close 

 adaptation of the plastron to the carapace when the door-like flap of the fore 

 |wut of the plastron is drawn up. Hunt man. 



1002. The carapace of the American Box Tortoise (Cutudo c/au*a). 



, Test. tab. 7 ; Grew, tab. 3. fig. 2. 

 Hob. North America. 



Mtu. Brit. 



1003. The carapace of the American Box Tortoise (Cutudo datad). MM. Brit. 



1004. The carapace of the American Box Tortoise (Cutndo clauta), with all the 

 scutes, save the last vertebral one, removed. J/imteria*. 



1005. The carapace of the American Box Tortoise (Ciit*do claiua), with the horny 

 scutes removed. The marginal plates but slightly indicate the inversion of 

 the border of the carapace. Mtu. Brit. 



2c 



