Professional Paper

Alachua Alachua County AMERICAN SPECIES Astarte bank of Flint Barilla Mountains Bearpaw shale beds Bluff C. W. Cooke central portion central region Chipola River coast Collected by E. M. collector Colorado convex County Creek Cuba Cushman Douville E. M. Kindle embryonic chambers Eocene equatorial band equatorial chambers feet Figure Flint River flora formation fossils fragment genus geologic georgiana hexagonal horizontal section shows Judith River Judith River formation lateral chambers Lemoine Macoma margin Marianna limestone miles north miles northwest millimeters Nome numerous Ocala limestone Oligocene Orbitoides Orthophragmina Panama papillae papillate peripheral portion periphery pillars Plate Pliocene ribs Sabalites sandstone Santiago Province second beach shale slightly Surface view Suwannee County Suwannee River T. W. Vaughan Tertiary thick thickened thin tion Type specimen U. S. G. S. station U. S. Geol U. S. Nat umbo vertical columns vertical section shows W. C. Mansfield Yateras River