LEPAS • DICTIONARY ONE.COM • Definition of Lepas

... found it indispensable to give names to several valves, and to some few of the softer parts of Cirripedes. The accompanying figure of an imaginary Scalpellum includes every valve; the two most important valves of Lepas are also given, in which the direction of the lines of growth and general shape differ from those of Scalpellum as much as they do in any genus. The names which I have imposed will, I hope, be thus acquired without ...

— A Monograph on the Sub-class Cirripedia (Volume 1 of 2) - The Lepadidae; or, Pedunculated Cirripedes • Charles Darwin