Ammonites from the
Prionocyclus novimexicanus (Marcou) 1858
Scaphites whitfieldi Cobban 1951
from concretions in the lower part of the main body of the Mancos Shale
southeast of Green River.
yokoyamai Tokunaga and Shimizu 1926
86mm long, 13mm at the aperture, from the Mancos Shale southeast of