Dinosaurs in ancient Egypt ?

I visited the British Museum.On one of the relics there was what seems to be a very accurate depiction of what looked to me like an Elasmasaurus DINOSAUR.. Can anyone tell me what this heirogyph signifies? PLEASE see also my film 'submarines and aeroplanes in ancient egypt' for more strange carvings on this artefact...If you think it's a scorpion, please post a photograph of an egyptian hieroglyph showing a scorpion. I've scoured the web and can't find one to compare with my dinosaurs