Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names plants / american / sea / area / type and 6095 more

Names mammalia / american / sargon / babylonia / type and 3227 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names la / american / life / called / order and 6753 more

Genre Entomology / Periodicals . Names thorax / apex / basal / american / sp and 14552 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names american / rock / called / life / area and 3634 more

By Baur, Georg, 1859-1898 / Case, E. C. (Ermine Cowles), b. 1871 . Genre Pelycosauria / Paleontology / Permian . Names xx / reptiles / reptilia / type / order and 677 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names la / par / life / horse / order and 6483 more