Margaritae et corallum ad melancholiam praecipue valent.
"The Anatomy of Melancholy" by Democritus Junior
CORALLUM (from the Latin for Red Coral).
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
The larvae of corals are free swimming ciliated forms known as planulae, and they do not acquire a corallum until they fix themselves.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various