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