159 



Measurements derived mainly from the more complete specimen arc as 



follows. 



Length. 



First vertebral plate . . . 

 Second vertebral plate. 

 Third vertebral plate . . 

 Fourth vertebral plate. 

 Fifth vertebral plate . . . 

 Sixth vertebral plate . 

 Seventh vertebral plate 

 Eighth vertebral plate . 

 Ninth vertebral plate . 

 Tenth vertebral plate. . 



Lines. 

 27 

 22 

 23 

 22 

 32 

 17 

 10 

 7 

 9 

 13 



Breadth. 



Linen. 

 ]3 

 14 

 14 

 . 14 

 15 

 IG 

 17 

 12 

 14 

 16 



Leuffth. 



Width 

 iuterually. 



Width 

 externally. 



F'irst costal plate . . 

 Second costal plate 

 Third costal plate. . 

 Fourth costal plate . 

 Fifth costal plate . 

 Sixth costal plate . 

 Seventh costal plate 



Lines. 



45 

 GO 

 70 

 73 

 GO 

 GO 

 47 



Lines. 



2G 

 24 

 24 

 22 

 20 

 17 

 15 



Lines. 

 37 

 2G 

 27 

 24 

 30 

 22 

 20 



The nuchal plate fore and aft has been about 2f inches ; its breadth about 

 an inch greater. 



The marginal bones, so far as preserved, appear to have nearly the propor- 

 tions and aspects as in Dermatemys. Their vertical measurement is about 

 2 inches, and their width about the same. 



The measurements of the scute impressions are as follows: 



lireadth. 



First vertebral scute impression . . 

 Second vertebral scute impression 

 Third vertebral scute impression . . 

 Fourth vertebral scute impression 



First costal scute at middle 



Second costal scute at middle 



Third costal scute at middle 



Lines. 



52 

 30 

 33 

 32 

 5G 

 4G 

 4G 



