It is a marvellous spectacle to see a formless fragment of calcium salt grow into a shell, a madrepore, or a fungus, and this as the result of a simple physical force.
"The Mechanism of Life"
Stéphane Leduc
He bent and affected to examine the madrepore.
"Major Vigoureux"
A. T. Quiller-Couch
As I searched in vain in the hollows on the reef and in the lagoon, for a living specimen of this madrepore, I conclude that it is confined to a zone outside, and beneath the surface, where it must be very abundant.
"Coral-Reefs"
Darwin, Charles