MARYLAND GEOLOGICAL SURVEY 169 



to the work of an anthropologist, Mr. W. II. Holmes, who in the investi- 

 gation of a deposit of arrow heads and fossil bones at Afton, Indian Ter- 

 ritory, obtained considerable numbers of teeth of the common mastodon 

 and of elephants. The former were of great interest as showing the 

 range of variation in teeth from one horizon and locality, while the latter 

 conclusively demonstrated the existence of two very distinct species of 

 elephants, larger than the Northern mammoth. 



Occurrence.- — The type specimen of E. imperator came from the 

 Pleistocene gravels of Nebraska, but the normal habitat of this species 

 was probably farther south, as is indicated by the numerous teeth from 

 Afton, Indian Territory, and by specimens from Texas and Mexico. 



Collections. — U. S. National Museum, American Museum of Natural 

 History. 



REPTILIA. 



Order TESTUDINES. 



Suborder THECOPHORA. 



Superfamily CRYPTODIRA. 



Family EMYDIDAE. 



Genus TERRAPENE Menem. 



Terrapene eurypygia (Cope). 

 Plate XL, Fig. 2. 



Gistudo eurypygia Cope, 1869, Synop. Ext. Batr. Rept. and Aves N. A.; 



Trans. Amer. Philos. Soc, vol. xiv, p. 124 

 Terrapene eurypygia Hay, 1902, Proc. Acad. Nat. Sci. Phila., vol. liv, p. 385, 



figs. 6, 7; Bibliog. and Cat. Foss. Vert. N. A., p. 449. 



6 Flint implements and Fossil Remains from a Sulphur Spring at Afton, 

 Indian Territory. W. H. Holmes, Amer. Anthrop. (U.S.) vol. iv, 1902, pp. 

 108-129. The substance of this paper, with additions and many more illustra- 

 tions was given under the same title in the Rept. of the U. S. Nat. Museum for 

 1901, pp. 237-252, plates 1-26. Plate 8 shows dorsal and lateral views of 

 right lower molar of E. imperator, and Plate 9 figures upper molars of 

 E. imperator and E. columbi, which show the differences between the two 

 most admirably. This is the same as plate xxxix of this paper. 



