Hugh Miller,
The Foot-prints of the Creator
(1850)
“ The immature Lepas is furnished with members well adapted for swimming, and with which it swims freely; as it rises towards maturity, these become blighted and weak; and, when fully grown,—fixed by its fleshy pedicle to the rock or floating log to which it attached itself in its transition state,—it is no longer able to swim. The immature Balanus is furnished with two eyes: in its state of maturity these are extinguished, and it passes its period of full development in darkness. ”
