Orthoceras (straight horn) is a genus of extinct cephalopod. Shown here is a curved orthoceras, common in limestone (Cyrtoceras Murchisoni), vintage line drawing or engraving illustration. Poster #354193122
Orthoceras (straight horn) is a genus of extinct cephalopod. Shown here is a curved orthoceras, common in limestone (Cyrtoceras Murchisoni), vintage line drawing or engraving illustration. Poster #354193122
