The whole of India is girt with dragons of enormous size; for not only the marshes are full of them, but the mountains as well, and there is not a single ridge without one. Now the marsh kind are sluggish in their habits and are thirty cubits long, and they have no crest standing up on their heads, but in this respect resemble the she-dragons. Their backs however are very black, with fewer scales on them than the other kinds; and Homer has described them with deeper insight than have most poets, for he says that the dragon that lived hard by the spring in Aulis had a tawny back; but other poets declare that the congener of this one in the grove of Nemea also had a crest, a feature which we could not verify in regard to the marsh dragons.