PLATE CXXIV. 
MirocENE PROBOSCIDEA 
Nomenclature 
Cope 1880-3 Revised 1915 
Mastodon ligoniferus ’ Tetralophodon sp. 
Fias. 1-2. ?Vetralophodon sp. Allied to Tetralophodon campester. Amer. Mus. No. 8531, 
Cope Coll. Black Hills, 8. Dakota, horizon uncertain. 
Fia. 1. Lower jaw external view; fig. 2, superior view; fig. 3, ? upper molar; fig. 4, distal end 
of femur. 
Fig. 3. ? Tetralophodon sp.; upper molar, ? Amer. Mus. No. 8529, Cope Coll. Republican 
River beds, Driftwood Creek, Nebraska. Specimen figured on pl. CX XII. 
Fig. 4. ? Tetralophodon sp., distal end of femur of No. 8529. See pl. CX XII. 
All one-fourth natural size. The name ligoniferus appears to be unpublished. 

