Balani and Serpulae are sometimes found adhering to floating cocoa-nuts, and even to fragments of pumice.
"Principles of Geology" by Charles Lyell
Serpulae, on volcanic rocks, in Sicily, 151.
"A Manual of Elementary Geology" by Charles Lyell
How are Sabella and Serpula protected?
"A Guide for the Study of Animals" by Worrallo Whitney
Serpulas, or Sea Worms.
"Scientific American, Vol. XXXIX.--No. 24. [New Series.], December 14, 1878" by Various