430 FOSSIL TURTLES OF NORTH AMERICA. 
emargination at either the dermal or osseous sutures. The posterior part of the margin of the poste- 
rior marginals is very conyex or flared upward, descending at or behind the osseous suture. Thus the 
free edge has an undulating 
form. The caudal marginal 
bone is recurved, not prom- 
inent, and with a regular 
entire free margin. Its lat- 
eral sutures expand forward, 
so that its margin Is narrower 
than its anterior portion. It 
is not divided by a dermal 
suture, consistently with its 
generic character. The sur- 
faces of the bones are nearly 
smooth. The scutal sutures are wide, and have distinctly-defined borders. The marginal near the bridge 
is remarkably massive, the bridgeward suture being twice as thick as that } joining the free marginal. 
The size of the Testudo undata is as great as that of any of the species of land-tortoises of our 
Fic. 573.—Testudo undata. Pygal and hinder peripherals of the type. 
+. Above the pygal is a section of the tenth peripheral. 
‘Tertiary formations. 
MEASUREMENTS. 
Meter. 
Length of the free margin of three consecutive posterior marginal bones 0.310 
Length of the last marginal bone : 3 122 
Width of the last marginal bone 135 
Thickness at the middle... . O17 
Thickness of the bridgeward suture of a lateral m arginal L040 
Thickness of the opposite suture of the same. . ; ; » 015 
Fragments of other specimens, probably of this species, present still larger proportions. 
As compared with the two described species of Stylemys, this species differs in the strong flaring 
and recurvature of its marginal bone, and is the more wedge- shaped caudal marginal bone, as well 
as its much larger size. 
To Cope’s description may be added the following: The thickness of the anterior sutural 
border of the eighth peripheral, where it joined the een is 38 mm. The border which 
joined the eae peripheral is 22 mm. thick. The eleventh peripheral is 122 mm. along the 
free border; and was about 70 mm. along the upper border. Its greatest thickness 1s 23 mm. 
The intermarginal sulci descend on low broad elevations of the surface and these elevations 
are more pronounct as the free border of the peripheral is approacht. 
Testudo klettiana Cope. 
Fig. 574. 
Testudo klettiana, Cope, Ann. Rept. Chief Engineers, 1874 (875), p- 995 (of separata, p. 75); Wheeler’s 
Rept. on Sury. W. rooth Merid., rv, 1877, p. 285, plate Ixvii, fig. 3—Hay, Bibliog. and Cat. Foss. 
Vert. N. A., 1902, p. 451. 
This species was described from a specimen found by Professor Cope in the Loup Fork 
Miocene of New Mexico. The type consisted of a pygal bone (fg. 574). This is now in the 
U.S. National Museum at Washington. Its catalog number 
is 2126. Cope’s description is as follows: 
Indicated especially by a caudal bone of a tortoise of larger 
size than the one regarded as typical of the T. undata. It is, of 
course, probable that some of the fragments above described with- 
out especial reference belong to it. The caudal bone differs from 
that of 7. undata in being nearly plane, and thus wanting the recur- 
yature or superior concavity of the corresponding bone of that 
species. Its form is also quite different. Its lateral sutures are 
nearly parallel, instead of divergent anteriorly, and slightly concave; 
if a little expanded proximally, it contracts again to the suture for 
the pygal bone. The suture is a short squamosal on the outside of 
the caudal. The thickness of the bone is almost uniform to near 
the proximal suture; there an abrupt rabbet commences the plane 
of the thinner pygal. 
Fic. 574.—T estudo klettiana. Pygal 
forming the type. X 3 
