gs FOSSIL TURTLES OF NORTH AMERICA. 
The width of the base is 150 mm. The bridge is 167 mm. wide The length of the hinder lobe 
was approximately 100 mm.; the width at the base is 165 mm. It narrows rather rapidly 
backward, so that at the femoro-anal sulcus the width 1s 104 mm. 
There are present large mesoplastra, the boundaries of which can be pretty satisfactorily 
determined. These are about 35 mm. wide at the midline, but they expand to about 85 mm. 
at the peripherals. 
The median longitudinal sulcus runs a very irregular course, and across the femorals it 
can not be distinguisht with certainty. The erieale occupy 70 mm. of the midline; the 
pectorals, about g0 mm.; the abdominals, about 35 mm.; the 
femorals, about 52mm. The femoro-anal sulcus runs far forward 
from its starting point on the border of the plastron. Probably on 
account of weathering, the sculpture of the carapace is nearly 
Vertebral. Length. Width. 
(ea | 82+ Q B : r a - ake 
! ae iP obliterated, appearing only in a few spots. On the plastron it 1s 
2 7 | 2 . . = = a o ome 
3 Sele Ge more distinct. It appears to have resembled that of T. insiliens 
4 61 9 and consists of narrow and low ridges and tubercles. Some traces 
5 os 36 
are observed of the ridges due to the growth of the scutes. 
This species differs from J. imsiliens in having the nuchal 
less deeply excavated, in having a median depression along the back, and in having the hinder 
lobe of the plastron more rapidly reduced in width backward. In T. insiliens the bridges are 
considerably wider than the base of the hinder lobe. 
Genus CHARITEMYS nov. 
A genus of Baénide. So far as known like Thescelus, but with the axillary buttresses 
ascending to near the neural borders of the first costals. Inguinal buttresses probably ascend- 
ing on inner surfaces of the fifth and sixth costals, but not to so great a height as did the axillary 
buttresses. 
Type: Charitemys captans Hay. 
Charitemys captans sp. nov. 
Text-figs. 93-95. 
The type of the present species is No. 6098 of the American Museum of Natural His- 
tory. It forms a part of the Cope collection of fossil reptiles and was collected in 1876, by 
Messrs. Sternberg and Isaac, in the Judith River deposits of Montana. There are present 
considerable parts of both the carapace and the plastron, but unfortunately important parts 
are missing. 
In size this species appears to have been somewhat smaller than the type of T hescelus 
insiliens, judging from the plastral bones, but of the same size, if we judge from the widths of 
6 costal bones. 
Of neurals there are portions of only two. One of these, probably the eighth, has a width 
of 44 mm. Its length can not be determined, what is regarded as the posterior end being 
broken away. On fhe supposed anterior end 1s a scunaedn carina. ‘The broader end is crost 
bya sulcus, probably that between the fourth and the fifth vertebral scutes. On the under side 
are three impressions for three neural spines. The other neural is only 30 mm. wide. It 
probably belonged near the beginning of the series. 
Of the costals there are present the proximal end of the first of the left side, the right 
second, third, and sixth, and the left fourth, fifth, sixth, and seventh. Fig. 93 represents the 
second and third right costals; fig. g4, the fourth to the seventh of the left side. Of the latter 
three, more or less of the distal ends are missing. The supposed first presents difhculties. 
On the upper surface are found portions of the first and second scute areas and of the first 
costal area. The area of the first vertebral scute on this costal is only 16 mm. wide. The 
whole width of this scute could hardly have exceeded 65 mm. On the lower side is a large tri- 
angular articular scar for the axillary buttress of the plastron. This approacht aitan 21 
mm. of the neural border of the costal. Between the scar and the neural border is a sharp 
ridge from which appears to have been broken the rib-head of the costal. This was much 
slenderer than those of the succeeding costals. The slenderness of this rib-head was hardly to 
