Fig. 54 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America

Fig. 54. Hoploscaphites nodosus (Owen, 1852), macroconchs. A, B. BHI 4948, Baculites compressus Zone, Pierre Shale, Meade County, South Dakota. A. Ventral; B. left lateral. C, D. YPM 35598, YPM loc. C3347, Pierre Shale, Belle Fourche River, South Dakota. A spiral furrow extends from the point of exposure to the aperture on the right side of the shell (fig. 35B). C. Ventral; D. left lateral. Specimens are illustrated natural size.