BOTHREMYDIDE. I 15 
The entoplastron must have been unusually large. Its anterior end approacht within 
32 mm. of the anterior border. The anterior angle was slightly greater than 100°. The sides 
bounding this angle were approximately 130 mm. long. The width must have been about 
160 mm. The inferior surface of the epiplastron displays an obscure reticulation, but the 
hypoplastron is smooth. 
There are present 2 fragments of the right xiphiplastron. One of these is the hinder angle 
and bears the ischiadic articulation; the Gels shows the bottom of the great notch at the rear 
poe 109. and a part of the edian suture. These 
5 4 i fragments join and are represented by fig. 
) ; _ 108. The angular extremity had a very obtuse 
. ; 110. tree border. A short distance from the edge 
: the thickness is 17mm. The ischiadic articu- 
latory (fig. 108, #) surface is elevated and 
about 40 mm. long and 24 mm. wide. It is 
now much eroded. In front of this articula- 
tion the thickness is 13 mm. The median 
—.~ longitudinal suture is coarse and jagged. Fig. 
iad poe gs er sirendus: 3 TOO Teptesents.a section across the hinderouter 
eseeA A NOE: angle along the line CD of fig. 112. Fig. 110 
: is a section along the line 4B of fig. 108. The 
ee Aa a al i oe ane posterior notch was about 180 mm. wide and 
represented by figure 109; E, ischiadic articulation, | relatively shallow. It appears to differ much 
109. Section along line CD of figure 108. from the notch in other species of the genus. 
Baan > on along. ling Po Agbre 708, While the free border of the extremity of 
111. Section at hypoxiphiplastral suture. A aad J 
the xiphiplastron is very obtuse, more anteri- 
orly it becomes acute. Fig. 111 is a section at the hypoxiphiplastral suture. 
Cope described a bone which he regarded as the proximal end of the femur. With little 
or no doubt the bone is the left humerus. It presents close resemblances to the corre- 
sponding bone of Chelydra, the radial and ulnar processes, however, not being so thin as in 
the latter genus. Cope also described as a coracoid a bone which certainly “belongs to the 
pelvis, having, as Cope states, 2 sutural faces and 1 cotyloid face. 
Taphrosphys molops Cope. 
Figs. 112-120. 
T aphros phys molops, Core, Cook’s Geol. New Jersey, 1868 (1869), p.735 (name only); Amer. Naturalist, 
11, 1869, p. 893 Proc, Amer. Philos. Soc., x1, 1870, p. 274; Ext. Batrach., Reptilia, Aves N. A., 
1870, pp. 158, 159, plate vii, fg. 16, text-figs. 43, 44; Vert. Cret. Form. West, 1875, p. 263.—Hay, 
Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 438. 
Taphros phys molops var. enodts, CoPE, ane eaear , ete., p. 162. 
Prochontas enodts, Cope, Ext. Batrach., etc., pp. 158, 160. 
Bothremys (Taphros phys) molops, Z11TE1., ‘Handbuch Palzontologie, 1889, p. 547. 
Of this species Cope had a number of specimens, none wholly complete, most of them 
very incomplete. The one which presented large portions of the carapace and the plastron 
had been obtained from the upper bed of Creticests greensand, at Barnesboro, Gloucester 
County, New Jersey. This specimen is now in the American Museum of Natural History and 
has the number 1472. Portions were figured by Cope, and it seems proper to regard it as the 
type of the species. It is probable that the description of a specimen from SPomncrtow n 
appeared a short time before the detailed description given in the Extinct Batrachia, etc.; but 
that earlier description is not one that would enable us to determine the species, no part was 
figured, and the specimen was not intended by Cope to stand as the type. 
Of the carapace (fig. 112 ) Cope figured the nuchal and the right and left first peripherals. 
Portions of all these bones are now missing. The anterior outline of the carapace was rounded 
as in T. longinuchus, and the free border was acute. The shell appears to have been of only 
moderate convexity. The width of the nuchal anteriorly was 50 mm.; its greatest width, close 
to 115 mm.; its length was probably about 115 mm. Its proportions were therefore as in 7. 
