24 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



146. Archaeotherium mortoni Leidy. Plesiotype. 



Greater portion of skull and lower jaws containing parts of 

 both milk and adult dentition. White River (Oligo- 

 cene). South Dakota. 



Leidy, Owen's Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, 

 P- 558, pi. 10, figs. 1-3; Smithsonian Contrib. to Knowl., VI, 

 Art. VII, 1854, p. 57, pi. 8; pi. 9, figs. 1, 2, 5; pi. 10, figs. 1-7. 



.=Elotherium mortoni. 



783. Archaeotherium robustum Leidy. 'Type. 



Fragments of two lower molars and part of canine. White 

 River (Oligocene). South Dakota. 



Leidy, Owen's Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, p. 

 572; Smithsonian Contrib. to Knowl., VI, Art. VII, 1854, p. 66, 

 pi. 10, figs. 8-13. 



= Elotherium mortoni. 

 See Arctodon sp. undet. 



783. Arctodon sp. undet. 



Molars and fragment of canine. White River (Oligocene). 

 South Dakota. 

 Leidy, Proc. Acad. Nat. Sci. Phila., V, 1851, p. 278. 



= Elotherium mortoni. 



See Archaeotherium robustum. 



2862. Asthenodon segnis Marsh. Cotype. 



Portion of left lower jaw containing incisors, canine, and 

 two premolars. Morrison (Jurassic). Como, Wyom. 

 ing. 

 Marsh, Amer. Journ. Sci. (3), XXXIII, 1887, p. 336, pi. 9, fig. 6. 



3649. Auchenia major Leidy. Type. 



Right astragalus. Pliocene. Levy County, near Archer, 

 Florida. 



Leidy, Proc. Acad. Nat. Sci. Phila., 1S86, p. 11. 



= Procamelus major. 



3435. Auchenia minimus Leidy. Type. 



Right astragalus. Pliocene. Archer, Alachua County, 

 Florida. 

 Leidy, Proc. Acad. Nat. Sci. Phila., 1886, p. 11. 

 = Procamelus minimus. 



3354. Auchenia minor Leidy. Type. 



Right astragalus. Pliocene Levy County, Florida. 

 Leidy, Proc. Acad. Nat. Sci. Phila., 1886, p. 11. 

 = Procamelus minor. 



4676. Basilosaurus cetoides (Owen). Plesiotype. 



Pelvic girdle and right femur. Eocene. Cocoa, Alabama. 

 Lucas, Proc. U. S. Nat. Mus., XXIII, 1900, p. 327, pis. 5-7. 



