Oligocene echinoids are rare, which makes important this material from three quarries in North Carolina. Three species occur in the state quarry at Pollocksville: <i>Psammechinus carolinensis</i>, new species, <i>Maretia ...
Biometric analyses of well-localized specimens of the trilobite <i>Dikelocephalus</i> from the St. Lawrence Formation (Upper Cambrian), northern Mississippi Valley, suggest that all specimens belong to a single, highly ...