Cope excitedly identified the fossilized bones as belonging to a new family of plesiosaur, larger than any then known.

FORBES: Magazine Article

Apparently, Loch Lomond has a beast reported to resemble a plesiosaur but has also been described as looking like a large crocodile.

BBC: Monsters Inc: Scottish lochs and their creatures

Still, nobody wants to get caught sticking the head on the wrong end of the creature, even if--as with Cope's long-necked plesiosaur--it looks as if it belongs there.

FORBES: At Auction