"Long-lived Ones." A legendary Indian tribe whose members live to over a hundred years old. They never bear the marks of old age, but die as if they were in the middle of their years. They live in the parts of India in which there are no shadows. The men are about eight feet in height.
They are called Gymnetae by Crates of Pergamus. Isigonus mentions a tribe called the Cyrni, who live a hundred and forty years. Other long-lived tribes are the Chinese Serae and those who dwell upon Mount Athos, feeding exclusively on the flesh of vipers.
Pliny. Natural History VII.