| Ammonoids from the Lower Triassic Union Wash Formation, Union Wash, Inyo County, California. "Figures 1-12 Clypeoceras hooveri; 1-3 side and rear views and septum of the type specimen (fig. 3, septum not correct in detail); 4-6 side and front views and septum of an adolescent specimen; 7-8 side and front views of a small specimen showing the Meekoceras stage; 9 septum of the same specimen; 10-12 side and front views and septum of an adolescent specimen, showing the Lecanites stage, broken out of a larger specimen." |