TY - JOUR A1 - Meek, F. B. A1 - Hayden, F. V. JO - Proceedings of the Academy of Natural Sciences of Philadelphia N1 - published May 26th, 1857 according to JSTOR SP - 117 EP - 148 C1 - 9: 117–148 TI - Descriptions of new genera of fossils, collected by Dr. F.V. Hayden, in Nebraska territory, under the direction of Lieut. G.K. Warren, US Topographical Engineer; with some remarks on the Tertiary and Cretaceous formations of the north-west, and parallelism of the latter with those of other portions of the United States and Territories. UR - https://www.biodiversitylibrary.org/page/6330383 VL - 9 PY - 1857 Y2 - 2024-03-28 ER -