68 FLORIDA GEOLOGICAL SURVEY-EIGHTH ANNUAL REPORT. 
and left first marginal scutes are more strongly developed. In the 
present specimen the longitudinal ridges are more prominent; but 
the two sets are present on the nuchals of both. The upper surface 
of the bone is cpiite uneven. Along the midline, in the area of the 
first vertebral scute, is a prominent rounded ridge, and this is 
continued forward by the elevated area of the nuchal scute. Just 
outside of the keel, on the area of the first vertebral scute, the sur¬ 
face is depressed. 
To this species is referred provisionally a right third peripheral, 
No. 3740, found just north of Labelle on the Caloosahatchee. Fig¬ 
ure 3 of plate 7 shows well the character of the sculpture and 
the relative height of the third and fourth marginal scutes. There 
is a well defined lateral keel. The length of the bone along the 
keel is 43 mm. Figures 4 and 5 of the plate present views of the 
two ends of the bone. 
A right sixth peripheral, No. 1755, is likewise referred to this 
species. It came from the canal of the Indian River Farms Com¬ 
pany, at Yero, north of this place, east of the Florida East Coast 
Railway bridge over Van Valkenburg Creek.' The deposits are re¬ 
garded as Pleistocene. The bone has a height, measured from the 
lateral keel and at the hinder end of the bone, of 44 mm. The 
length along the keel is 42 mm. In front the thickness on the 
keel is 5 mm.; at the rear, 13 mm. The sculpture (pi. 7, fig. 6) 
is identical with that of the third peripheral, above described; but 
it is not so strongly expressed. Figure 7 of the same plate pre¬ 
sents a view of the hinder end of this bone. 
At Vero Dr. Sellards collected the distal end of a, fifth costal 
bone of the right side, and this is referred to T. bisornatci. The 
greatest width is 42 mm.; and the bone indicates, therefore, a 
carapace of about 295 mm. in length, 11 inches. It resembles much 
the corresponding bone in T. scripta; but the thickening on the 
inner surface to receive the buttress of the plastron does not stand 
out so prominently. 
TRACHEMYS SCULPTA HAY. 
Plate 7, figs. 8-10. 
The numbers 3740a. and 3740c are given to two bones which 
are referred to Trachcmys sculpta, a species described by the writer 
in 1908 (Fossil Turtles N. A., p. 351, pi. LIV, figs. 4-9). The 
type of the species is a nuchal bone which was found in Pleisto- 
