ede) FOSSIL TURTLES OF NORTH AMERICA. 
While related to 7. strenuus, this species shows several differences. So far as the sculpture 
of the costals can be compared, that of 7. strenuus consisted of more numerous and deeper 
grooves. The entoplastron of 7. strenuus was much larger than that of the species here 
described. As shown by the section taken at the junction erie the hypoplastron the xiphi- 
plastron of 7. strenuus thickened much more rapidly and from a less acute edge, and its 
hinder portion was considerably thicker than in 7. dares. 5 
In the collection of the Geological Survey of Georgia, at Atlanta, are some portions of a 
turtle which appears to belong to this species. Indeed, fiiere are reasons for believing that they 
are portions of the same individual as the type bones. They are believed to have been secured 
in the same locality and formation as the carapace of Peritrestus ornatus; that is, on Bonna- 
hachee Creek, Stewart County, Georgia, in the Ripley formation, of the Upper Cretacéous. 
Among the fragments is one including apparently the anterior inner angle of the hypo- 
plastron. Sixty mm. behind the supposed hyohypoplastral suture the aiickness is 26 mm. 
Toward the suture mentioned the thickness is reduced. Here the upper two-thirds of the bone 
is beveled off, showing that the hyoplastron somewhat overlapt the hypoplastron. 
Another plastral fragment belongs probably to the hypoplastron behind the inguinal notch. 
‘Toward the median longitudinal suture the thickness is 16 mm. Toward the free border the 
thickness is much reduced, but the edge is rounded. The xiphiplastral bone in the American 
Museum shows that as the free border was continued backward it became acute. 
Another bone appears to be the second peripheral. It is 100 mm. long on the subacute 
tree border. The height was originally at least 82 mm. and the greatest thickness is 25 mm. 
‘The upper surface 1s convex from end to end, nearly plane up and down. 
Named after Dares, a pugilist beaten in an encounter described in the Eneid, book v. 
Taphrosphys nodosus Cope. 
Taphros phys nodosus, Corr, Ext. Batrach., Reptilia, Aves N. A., 1870, pp. 159, 167, plate i, fig. 16; Vert. 
Cret. Form. West, 1875, p. 264.—-Hay, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 438. 
The type of the present species forms No. 1480 of the American Museum of Natural 
History. The remains are evidently those of a large, thin-shelled turtle; but these remains 
are meager and fragmentary. They were obtained at Hornerstown, Monmouth County, New 
Jersey, apparently from the uppermost bed of Cretaceous greensand. The fragments are 
charged with iron pyrites and are disposed to fall to pieces. Portions of costals are to be 
recognized and a peripheral or two. 
Cope figured portions of 2 costals. His fg. 16 1s from a fragment 58 mm. wide and 10 mm. 
thick, but the inferior layer of the bone has peeled off. Another bone which comes down to an 
acute eee is probably a peripheral. Its thickness at a distance of 25 mm. from the edge is 
g mm. . still farther away, it becomes 12 mm. Another piece of bone is part of a bridge 
peripheral: having two sc ulptured faces at about a right angle with each other. 
The sc ulpture will, more than anything else, assist in the recognition of the species. This 
consists of pits and grooves, the latter anastamosing more or fees and separating tortuous 
ridges and pustules. ‘The general effect is that seen on the carapace of a coarsely sculptured 
trionychid. About 4 ridges are crost by a line 20 mm. long. 
This species will perhaps ev entually be found to belong to a genus distinct from T aph- 
rosphys. Indeed, the present writer knows of no characters “distinguishing i it from Peritrestus 
ornatus (Leidy) 
Genus AMBLYPEZA nov. 
A genus of pleurodirid turtles which differs from Taphrosphys in having the nuchal bone 
Shore and its front relatively broader and in having the free borders of the hinder peripherals 
thick and obtuse. Apparently a nuchal scute was present. 
Type: Ambly peza entellus Hay. 
Amblypeza entellus sp. nov. 
Bigs. d25-132- 
The type of this species is a lot of bones which belong to the collection of the Geological 
Survey of ‘New Jersey, and which were loaned to the writer by the present State geologist, Dr. 
