Nemopsidae, for the floating polyp Nemopsis, very similar to Tubularia in character; the medusa, on the other hand, is very similar to Hippocrene (Margelidae).
When Mt Helicon, enchanted by the song of the Muses, began to rise to heaven, Pegasus stopped its ascent by stamping on the ground (Antoninus Liberalis 9), and where he struck the earth Hippocrene (horsespring), the fountain of the Muses, gushed forth (Pausanias ii.
From his connexion with Hippocrene Pegasus has come to be regarded as the horse of the Muses and hence as a symbol of poetry.
HIPPOCRENE (the " fountain of the horse," 11 "airirov xpnvn), the spring on Mt Helicon, in Boeotia, which, like the other spring there, Aganippe, was sacred to the Muses and Apollo, and hence taken as the source of poetic inspiration.
The same story accounts for the Hippocrene in Troezen and the spring Peirene at Corinth.