TESTUDINID&. 457 
A portion of the rear (fig. 612) of the carapace along, and for a short distance on each side 
of, the midline is preserved. It includes the left hinder corner of the hexagonal sixth neural. 
This is seen to have had a width, across the hinder end, of 74 mm. Behind it is a little more 
than the left half of the seventh neural. This is broadest in front, and hexagonal, thru having 
the anterior angles truncated; and with a maximum width of about go mm. The fore-and-aft 
extent was about 50 mm. It is succeeded by the eighth neural, which has a length of about 
40 mm. and a width of about 45 mm. Behind this is a fragment of the first suprapygal. 
On it are indications of the fourth and fifth vertebral scutes. The exact length and breadth of 
these can not be determined. The fourth was 80 mm. wide behind and the width increases 
forward; while the fifth is 80 mm. broad at its anterior end and expands rapidly backward. 
The thickened marginal portion of the nuchal bone (hg. 611) is among the remains. Its 
extent along the front is about 105 mm. It is slightly emarginated at the midline, the edge is 
abruptly rounded and from the front it thickens rapidly backward, until at a distance of 40 mm. 
from the edge it is 42 mm. There appears to have been a nuchal scute 20 mm. wide. It is 
quite probable that all the anterior peripherals were thickened and had obtuse edges. Large 
portions of the peripherals from the axillary notches backward are present. Those behind the 
inguinal notches are higher than long; subacute at the free borders, nearly vertical, not flaring, 
except that the second and third on each side of the caudal peripheral flare slightly. The first 
behind the inguinal buttress is 160 mm. high. Behind this the others descend, until the pygal 
(fig. 613) is 115 mm. high at its lateral border. They are all about 80 mm. long at their free 
O13a. 
Fics. 612 AND 612.—Testudo campester. Portions of rear of carapace of type.  }. 
>] J 4 
612. c.p.8, eighth costal plate of type; 7.7, 7.8, seventh and eighth neurals; spy, suprapygal. 
613. Pygal and eleventh peripherals. a, section of eleventh peripheral; per. 11, eleventh peripheral; py, pygal. 
borders. The pygal is notcht at its upper border for the second suprapygal, 95 mm. wide at 
this border, and 65 mm. wide at the free border. The thickness of the peripherals is about 40 
mm.; where they articulate with the costals and the pygal the thickness is about 15 mm. The 
free border of the peripherals is very slightly notcht where it is crost by the sulcus. 
It is proper to compare this species with others which have been described from the Plio- 
cene deposits. 
T. crassiscutata (Leidy, Trans. Wagner Free Inst., 11, 1899, p. 31, plate vi) differs in having 
the plastron much broader at its hinder end and with a much wider and shallower notch. The 
lip of the anterior lobe is also different. 
T. hexagonata Cope, of the Equus beds of Texas (4th Ann. Rep. Geol. Surv. Texas, 1893, 
p- 77; plate xxii, fig. 2) has both anterior and posterior lobes of the plastron quite different. 
Especially is it stated that the sulci defining the pectoral scutes in front and behind approach 
each other at the midline. In 7. campestcr these sutures are far apart at the midline. 
T. laticaudata Cope, of the Equus beds of Texas (op. cit., p. 75, plate xxii, fig. 1), has the 
anterior lip of the plastron notcht in the middle so as to be doubly convex, and the lower side 
of the lip has two longitudinal fossz. The posterior lobe, with its notch, 1s also different, the 
notch being much wider and much shallower. 
