A story about a semi-god human figure -

Legend:
A story about a semi-god human figure. In it writer focuses on the greatness of a human being though some supernatural beings may be involved in it.
Beowulf, King Arther, Faust and Rabin Hood are the great legendary figures.

Myth:
An Ancient story about God and Goddesses and their mysterious activities.
Mythology:
Myths are collectively called mythology. Greek, Roman, Egyptian, Indian mythology are well known.

Source: An ABC of English Literature by Dr. M Mofizar Rahman.