| Ammonoids from the Lower Triassic UnionWash Formation, Union Wash, Inyo County, California. "1-4 Prophingites austini; side, front, and rear views and septum of the type specimen. 5-25 Juvenites dieneri; 5-6 side and rear views; 7-9 side and front views and septum; 10-13 side, front and rear views and septum of the type specimen; 14 inside view of part of the body chamber broken from the specimen shown in Figures 10-13; 15-18 side, front and rear views and septum of an adolescent specimen, diameter 9.5 millimeters; 19-21 side, front, and rear views of an adolescent specimen, showing the shell; 22-25 side, front, and rear views and septum of a larval specimen having a diameter of 2.6 millimeters. Specimens 26-33 Xenodiscus marcoui; 26 side view; 27-28 side view and cross section of a broken whorl; 29-31 side view, cross section, and septum; 32-33 side and front views of an adolescent specimen." |