168 FOSSIL TURTLES OF NORTH AMERICA. 
Key to Species oF TOXOCHELYs. 
A. Species based on skull. 
a. Symphysis of lower jaw short, about one-fifth of length of lower crushing-surface of jaw. 
b. Snout rather pointed. 
c. Jaws slender and weak; symphysis thin, sloping on upper surface........ latiremis 
cc. Jaw rather heavy; the upper surface of the symphysis horizontal ........ Serrtfer 
bb: Snout, broad and! rounded sacs meters te ete tee erate erates brachyrhina 
aa. Symphysis long, at least one-third the length of the crushing-surface. 
d. Nasal opening narrow; upper surface of the symphysis sloping....... steno pora 
dd. Nasal opening normal; symphysis flat above. 
@: Skull as" broadtastlong tacts locust tot asi teeters avofored Se elkader 
ée:*Skull@longer:thanmibroad: seers se eee es ce ett aeee Estee arise = procax 
AA=Speciés. based’ on: shellfouly:,. 2/23 wteerrs te octetatenee eee eee ear Petey baurt 
Fics. 202-205.—T oxochelys latiremis. Skulls and lower jaw. +. 
202. Upper view of front of skull. No. 1496 A.M.N.H. 
203. Upper view of skull. No. 1497A.M.N.H. at, atlas; ax, axis; sg, squamosal. 
204. Lower view of same skull as preceding. at, atlas; ax, axis; qu, quadrate; sq, squamosal. 
205. Dentary portion of lower jaw, with section along the symphysis. No. 1497 A.M.N.H. 
Toxochelys latiremis Cope 
Figs. 200, 202-206. 
Toxochelys latiremis, Cope, Proc. Acad. Nat. Sci. Phila. 1873, p. 10; Vert. Cret. Form. West, 1875, 
pp- 98, 260, pl. viii, figs. 1, 2; Proc. Amer. Philos. Soc., xvit, 1877, p. 176.—Hay, Pubs. Field 
Columb. Mus., Zool., 1, 1896, p. 101, pls. X1v, xv; Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 4423 
Bull. Amer. Mus. Nat. Hist., xx1, 1905, p. 177-—CaseE, Univ. Kansas Geol. Surv., 1v, 1898, p. 371, 
plate Ixxix; plate Ixxx, figs. 1,2; ?plate Ixxxi, figs. 1-8, 10-13; ?plate Ixxxil, figs. 1, 2; plate Ixxxiii, 
figs. 2-4.—Wacner, Kansas Univ. Quarterly, vir, A, 1898, p. 201, fig. 1—WieLanp, Amer. Jour. 
Sci. (4), XIV, 1902, p- 95, figs. I, 2. 
Cynocercus incisus, LEIDY, Cont. Ext. Vert. Fauna West. Terrs., 1873, p. 279, plate xxxvi, figs. 17-21. 
The type of the present species consists of a portion of the lower jaw and a coracoid, of 
the Cope collection of reptiles and fishes, and is now in the American Museum of Natural 
History, New York, having the number 2362. The specimen was collected by Professor 
