ee 
451 
1872.] [Cope. 
M. 
Depth maxillary below orbit.............. wth, atv vii). OSD. 
“. » identany. at SyMphYsisi. <i. vise ci Litas oo 078 
“¢ notch of do. COs Gee. 0% WATPO tere. ada 048 
“« dentary behind symphysis......... is PA .angi ene 095 
i $$: JeaipCOrOmOl@TeplOme ci... G61). Casa Ob. .e 085, 
‘¢. ramus abt front:of, cotylus....... iW aa le lass 2.0061 
Length pterygoid fossa of do.....-....... PUGH » se 206 
“¢  cotylus GOH 283). (eso. HEE ee: 07 
“¢ postfrontal on inferior suture.........+.++.+-+ «195 
Depth oC ati boundary: of. orbit... sisosce oi i G7 a186) 
Thickness ‘‘ Lower, suture i. eit .6). J). sey 019 
Lengthifrom orbit (oblique):.... 2.5.00 s ss. i 115 
Length right quadrate............ ores tein ah ai eau 140 
Woidihy(amtero:posterion) «. ls cic.uswss. ei. rs at - ALO 
ice OlsCONO Wile aio Gat tiie bi Uap Lp. oe tae 064 
Length right pterygoid superiorly..... Abe aalewene 2 @kbD 
Depth do. at inner columellar angle.................. 100 
Length (oblique) of columella......... Ds 508s 1 os ashi. 08D 
Restoration. Better materials exist for the restoration of this species 
than is usual in the case of most extinct Testudinata. The cranium was 
.50 M., or 24 
it, as in the genus Chelone, the total would be as follows : 
5 inches in length. If the neck and carapace were related to 
Inches. 
Gansu ...vclig 297. Reet cee ene 4) Gis loses 248 
Neclsand: carapace in itcan Sees oo eidd ails er. teee ek 1582 
POtal 12.88 tects... ss eee is Ee ers a toys 1544 
an extent not far from the expanse of the flippers above given, viz., 11.30 
feet. The shortness of the cervical vertebra indicate that the proportions 
of the neck were not dissimilar to those of the existing marine genera. 
The flippers were probably similar to the same ; of the hind limbs nothing 
can now be stated. The shortness of most of the ribs considered in con- 
nection with the length of the carapace, is remarkable. Thus the long- 
est rib measures .51 M. or 16 inches; width of lateral marginal beyond 
apex of rib 2.25 inches ; width of vertebra 8 inches, which is, however, 
vovered by the expansion of the rib, included in this case in the length 
16 inches. Total width of carapace at middle, 36} inches. Length of 
carapace 118 inches; or wide 3 feet 4 inch; length 9 feet 10 inches. 
This outline, three times as long as wide, is justified in measure by the 
size, especially the lengths, of the marginals, which if placed end to end, 
would measure on one side of eleven pieces, if each were as long as the 
median, 8.5 inches K 11 = 7.8 feet. Some of the posterior marginals. are 
shorter than 8.5 inches, while some of the anterior appear to be longer. 
The length 8.5 may then be taken as an average. But they formed the 
circumference of an open are, so the axial length of the carapace should 
be placed at a lower figure than the aboye. This proposition may be off- 
setted by the fact that the marginals were not united to each other and 
