Hydra, The Lernean, a monstrous reptile inhabiting a marsh, with a number of heads, that grew on again as often as they were chopped off, and the destruction of which was one of the twelve labours of Hercules, an act which symbolises the toil expended in draining the fens of the world for man's habitation.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Hyderabad * Hygeia