170 FOSSIL TURTLES OF NORTH AMERICA. 
For description of the shoulder-girdle (fig. 206, from Case) and remarks thereon, see page 
166. The structure of the anterior limb has also been described and illustrated. 
No pelvis definitely known to belong to this species has been described. References to 
femora supposed to belong to this species have already been given, but these may have belonged 
to other species, as 7. procax or T. brachyrhina. Case (op. cit., p- 378) describes a hind foot 
which he refers to 7. /atrremis. This has already been mentioned on page 167. 
Wagner has described and figured a portion of a skull of a turtle from the Pierre shales 
of Kansas, which he identifies as 7. /atiremis. The present writer has not seen this skull. 
The lower jaw figured by Wagner certainly does not belong to T. /atrremus. 
Toxochelys serrifer Cope. 
Figs. 207-213. 
Toxochelys serrtfer, Cope, Vert. Cret. Form. West, 1875, p- 299.—Hay, Bibliog. and Cat. Foss. Vert. 
N. A., 1902, p. 442; Bull. Amer. Mus. Nat. Hist. xx1, 1905, p. 178, figs. 1-7. 
The type of this species is No. 1835 of the Cope collection of reptiles and fishes in the 
American Museum of Natural History, New York. It consists of the greater portion of both 
maxilla, the left dentary, the greater portion of the pterygoids, the right quadrate, the frontals 
Fires: 207-212.—T oxochelys serrtifer. Portions of skull of type. XT. 
207. Left dentary. Shows cutting-edge and grinding- 210, Cutting-edge and grinding-surface of upper jaw. 
surface. mx, maxilla; pal, portion of palatine. 
208. View of inner face of dentary. 211. Base of skull. boc, basioccipital; pt, pterygoid. 
209. Symphysis of lower jaw. 212. Upper aspect of skull. fr, frontals; pa, parie- 
tal; prf, prefrontal. 
and prefrontals, and two peripherals. “They were collected somewhere in the Niobrara deposits 
of Kansas by Professor Merrill, in 1865. 
The dentary (figs. 207-209) had not yet become co-ossified with its fellow. Its length is, 
as Cope states, 48 mm.; its width above, g mm.; the depth of the inner face, 7 mm. Longi- 
tudinally the alveolar surface is more strongly concave than in J. latiremis. Near the sym- 
physis the surface is considerably concave transversely, but posteriorly it is nearly flat. The 
inner border of this surface is nearly on the same level as the outer. At the symphysis (fig. 209) 
the alveolar surface extends nearly as far backward as does the lower face of the bone. The 
inner face of the dentary is occupied by a broad groove. The length of the alveolar surface of 
the symphysis is g mm. 
Slightly more than the posterior half of each maxilla (fig. 210) is present. The alveolar 
surface is flat, and the cutting-edge retains its height to its hinder end. In I. latiremis the 
height becomes reduced posteriorly. The pterygoids (fig. 211, pt) present no peculiarity. 
Where narrowest the portion of the palate formed by the pterygoids is 15 mm. wide. The 
quadrate does not differ from that of 7. latiremis, except that the articular surface for the 
