Note 265 — Chapter VI · RESPIRATION AND CIRCULATION—THE MANTLE

The result of some experiments by Professor Herdman upon Littorina rudis, tends to show that it can live much better in air than in water, and goes far to support the view that the species may be undergoing, as we know many species must have undergone (see p. 20), a transition from a marine to a terrestrial life. It was found that marked specimens upon the rocks did not move their position for thirty-one successive days (Proc. Liverp. Biol. Soc. iv. 1890, p. 50).