This is a slice of cartoonist Jim Unwin's diagram of mythical creatures. Unwin, based out of South London, is also noted around the Internet for his "virtual collection" of chairs from The Incredibles and as the designer of the video game Little Big Planet. Full sized image at the link.
Artist's Website
Link via Popped Culture
By any name, though, the diagram is great.
She was depicted as having the head of a beautiful nymph, but the body of a serpent. The lives of her and her children were only spared so that they could be sport for future heroes.
Also MANTICORE NEEDS SCORPION TOO. >:|