. Cenozoic mammal horizons of western North America. Mammals, Fossil; Paleontology; Paleontology; Paleontology; Mammals, Fossil. 3^ CEKOZOIC MAMMAL HOBTZOXS phodontidse; (2) by the sudden appearance of the four Tertiarv orderSj (a) Perissotiaotyla-Equidge'' and -Lophiodontidie, (b) Artio- dactvla. (c> Primates, and (</) Rodentia. c 790' 315' B X<r7i hdo therrizm zoTie N Ccryphodon (rar^ Lambdotfiei man prfmaewm Phenocodus Fohijpptjs Cfistatjs Heptodon ^ A 949' Hyopsodus Sarcofemar. Other faunal identifications with Europe are premature. With the exception of the archaic and modem fami


. Cenozoic mammal horizons of western North America. Mammals, Fossil; Paleontology; Paleontology; Paleontology; Mammals, Fossil. 3^ CEKOZOIC MAMMAL HOBTZOXS phodontidse; (2) by the sudden appearance of the four Tertiarv orderSj (a) Perissotiaotyla-Equidge'' and -Lophiodontidie, (b) Artio- dactvla. (c> Primates, and (</) Rodentia. c 790' 315' B X<r7i hdo therrizm zoTie N Ccryphodon (rar^ Lambdotfiei man prfmaewm Phenocodus Fohijpptjs Cfistatjs Heptodon ^ A 949' Hyopsodus Sarcofemar. Other faunal identifications with Europe are premature. With the exception of the archaic and modem families above hsted, the Euro- pean famihes and subfamihes are different from the American so far « The Eqoide of the l^pamacien axe more primitive thaay the oldest Wasatch spee>e&.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osborn, Henry Fairfield, 1857-1935; Matthew, William Diller, 1871-1930; Matthew, William Diller, 1871-1930. Faunal lists of the Tertiary Mammalia of the West; Geological Survey (U. S. ). Govt. Print. Off.


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