The crinoid Dizygocrinus indianensis Lyon & Casseday probably of the Carboniferous Period found in Indiana.  Fossil is on display at ...

A large plate showing Talarocrinus patei crinoids of the early Carboniferous Period found in Kentucky.  This plate is on display at the Sm...

A Calymene clavicula trilobite of the Silurian Period found in Indiana, USA.  This picture was taken at Smithsonian Museum of Natural His...