By Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. and 5 more . Genre n-usp-- / Paleontology / Western states / Paleobotany / Western states and 2 more . Names american / apex / type / axis / area and 4805 more

By Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. and 5 more . Genre n-usp-- / Paleontology / Western states / Paleobotany / Western states and 2 more . Names leaves / sp / plants / spigelia nov. / apex and 8467 more

By Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. and 5 more . Genre n-usp-- / Paleontology / Western states / Paleobotany / Western states and 2 more . Names animal / proteus / difflugia / america / amoeba and 6561 more

By Leidy, Joseph, 1823-1891 . Genre Vertebrates, Fossil / Paleontology / Cretaceous / Paleontology / Tertiary and 2 more . Names animal / fossils / xx / intermediate / animals and 2731 more

By Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. and 5 more . Genre n-usp-- / Paleontology / Western states / Paleobotany / Western states and 2 more . Names crest / fossa / diastema / american / apex and 9423 more

By Leidy, Joseph, 1823-1891 / Cope, E. D. (Edward Drinker), 1840-1897 / Lesquereux, Leo, 1806-1889 / Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 / Thomas, C. and 5 more . Genre n-usp-- / Paleontology / Western states / Paleobotany / Western states and 2 more . Names type / fossils / stoliczka / fox / umbilicus and 13618 more