20 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



2209. Scylliorhinsis gracilis Williston. Type. 



Tooth. Greensand (Cretaceous). Greenleaf Ranch, ten 

 miles west of Belvidere, Kansas. 

 Williston, Kansas Univ. Quar., VII, 1900, p. 245, pi. 24, fig. 6. 



2207. Scylliorhinsis planidens Williston. Type. 



Tooth. Greensand (Cretaceous). Greenleaf Ranch, ten 

 miles west of Belvidere, Kansas. 

 Williston, Kansas Univ. Quar., VII, 1900, p. 245, pi. 24, fig. 7. 



2208. Scylliorhinsis rugosus Williston. Type. 



Tooth. Greensand (Cretaceous). Greenleaf Ranch, ten 

 miles west of Belvidere, Kansas. 

 Williston, Kansas Univ. Quar., VII, 1900, p. 245, pi. 24, fig. 5. 



4855. Strepsodus arenosus Hay. Type- 



Scale in nodule. Lower Carboniferous. Near Colliers 

 Station, Blair County, Pennsylvania. 



Hay, Proc. Amer. Philos. Soc, XXXIX, 1900, p. 113, text fig. 3. 



4979. Syllaemus latifrons Cope. Type. 



Head and body. Cretaceous. New Mexico? 



Cope, Rept. U. S. Geol. Surv. Terr., II, 1875, pp. 181, 273; Rept. 

 U. S. Geol. Surv. W. 100th Merid., IV, Pt. II, 1877, p. 27, pi. 23, 

 figs. 1, 2. 



1717. Tamiobatis vetustus Eastman. Type. 



Cranium. Devonian? Eastern part of Powell County, 

 Kentucky. 



Eastman, Amer. Journ. Sci. (4), III, 1897, p. 85, text fig., pi. 1. 



4058. Trichophanes foliarum Cope. Type. 



Anterior half of skeleton and reverse on slabs. Oligocene. 

 South Park, Colorado. 



Cope, Bull. U. S. Geol. and Geogr. Surv. Terr., IV, 1878, p. 73; 

 Rept. U. S. Geol. Surv. Terr., Ill, 1884, p. 753, pi. 69, fig. 4. 



4060. Trichophanes hians Cope. Type. 



Skeleton on slab. Oligocene. Osino, Nevada. 



Cope, Proc. Amer. Philos. Soc, XII, 1872, p. 481; Rept. U. S. Geol. 

 Surv. Terr., Ill, 1884, p. 753, pi. 69, fig. 3. 



MAMMALS. 



2145. Aceratherium acutum Marsh. Type. 



Skull. Republican River (Upper Miocene). Quarry E, 

 near Long Island, Kansas. 

 Marsh, Amer. Journ. Sci. (3), XXXIV, 1887, p. 335, text figs. 3, 4. 

 = Teleoceras fossiger. 



138. Aceratherium nebrascensis (Leidy). Type and paratype. 



J 39- Leidy, Proc. Acad. Nat. Sci. Phila., 1851, p. 331. 



= Hyracodon nebrascensis. 

 See Rhinoceros nebrascensis. 



