Oceans of Kansas Paleontology, Fossils from the Late Cretaceous Western Interior Sea, The tale of a tail: Or how easy it was to put the head on the wrong end of Elasmosaurus platyurus Cope 1868

http://www.oceansofkansas.com/

This is a wonderful resource that illustrates and explains the discovery and story of the famous Elasmosaurus platyurus Cope of 1868. Cope put the head on the wrong end of Elasmosaurus platyurus Cope.

Referenced in:
Edward Drinker Cope
The Missing Piece: A Tale of a Tail