X AMERICAN MESOZOIC MAMMALIA 



Amphidontidae Simpson 1925 40 



Am;p/iidon Simpson I g2S 41 



Amfhidon suferstes Simpson 1925 41 



Eurylambda, new genus incertae sedis 41 



Eurylambda aequicrurius (Simpson 1925) incertae sedis 42 



PANTOTHERIA Marsh 42 



Paurodontidae Marsh 1887 48 



Paurodon Marsh 1887 49 



Paurodon valens Marsh 1887 49 



Archaeoirigon Simpson 1927 5^ 



Archaeotrigon brevimaxillus Simpson 1927 5^ 



Archaeotrigon distagmus, new species 5^ 



Archaeotrigon sp. indet. 53 



Tathiodon Simpson 1927 S3 



Tathiodon agilis (Simpson 1927) 53 



Dryolestidae Marsh 1879 54 



Dryolestes Marsh 1878 57 



Dryolestes friscus Marsh 1878 5^ 



Laolestes Simpson 1927 61 



Laolestes eminens Simpson 1927 61 



Laolestes grandis, new species 64 



fLaolestes sp. indet. 64 



Amblotherium Owen 1871 65 



Amblotherium gracilis (Marsh 1879) 66 



Amblotherium debilis Simpson 1927 68 



Kefolestes Simpson 1927 69 



Kefolestes coloradensis Simpson 1927 70 



Herfetairus Simpson 1927 7^ 



H er-petairus arcuatus (Marsh 1879) T^^ 



? H erfetairus humilis, new species 74 



Melanodon Simpson 1927 75 



Melanodon oweni Simpson 1927 75 



Melanodon goodrichi, new species 76 



Melanodon cf. goodrichi Simpson 77 



Herfetairus or Melanodon, spp. indet. 77 



Euthlastus Simpson 1927 79 



Euthlastus cordiformis Simpson 1927 79 



Miccylotyrans Simpson 1927 80 



Miccylotyrans minimus Simpson 1927 80 



Malthacolestes Simpson 1927 81 



Malthacolestes osborni Simpson 1927 82 



Pelicofsis Simpson 1927 82 



Pelicofsis dubius Simpson 1927 83 



