no. 1G40. 



NEW SPECIES OF FOSSIL TURTLES— If 1 V. 



165 



third, and eighth peripherals and large parts of those succeeding are 

 present. The free borders of the first and the second measure each 33 

 mm.; the height of the first is 32 mm.; that of the second, 25 mm., 

 each measured at its hinder border. The width of the eighth is 25 

 nun.; its free border is wanting, as well as that of the peripherals be- 

 hind it. Most of the first neural is gone; 

 its hinder end was placed 75 mm. behind 

 the front of the shell. The following 

 table gives the dimensions of those neurals 

 present : 



The eighth appears to have been 18 mm. 

 long and 22 mm. wide. No part of the 

 supra pvgals remains. 



The vertebral scutes are of moderate width, being longer than wide. 

 The following table presents their dimensions: 



The nuchal scute is 15 mm. long 

 and 11 mm. wide. The marginals 

 do not rise as high as the peri- 

 pherals that bear them, the second 

 and the third lacking about 12 mm. 

 of doing so. All the sulci of the 

 carapace run along at the bottom 

 of broad grooves varying from 8 to 10 mm. in width. 



The plastron (fig. 3) had a length of 230 mm. The front of the 

 epiplastral lip is damaged and the hinder angles of the xiphiplastra 

 are missing, though they have left their impress in the sandstone 

 matrix. The anterior lobe has a length of GO mm. and a width of 

 107 mm., From the axilla the border of the lobe passes by a regular 

 curve to the base of the epiplastral lip. The latter has a width of 

 37 mm., and it projected beyond the ends of the gular sulci at least 

 11 linn. The upper surface of this lobe is hidden. The entoplastron 

 is 27 mm. long and 42 mm. wide, the greatest breadth being at the 

 middle of the length. The hinder border is broad and rounded. 



The bridge is 78 mm. wide, and of this the hyoplastron occupies 

 48 nun. 



The hinder lobe had a length close to 02 mm.: the width at the base 

 and at the ends of the hypo-xiphiplastral sutures is 105 mm. Half- 

 way between the two points named the width is 108 mm. From the 

 hypo-xiphiplastral sutures the width contracts rapidly to the ends 

 of the femoro-anal sulci, where there are deep notches. Here the 

 width is only 70 mm., perhaps less, inasmuch as the bones of the two 

 sides appear here to be spread apart. The hinder angles of the 

 xiphiplastra seem to have been acute. 



