Note 183 — Chapter III · ENEMIES OF THE MOLLUSCA—MEANS OF DEFENCE—MIMICRY AND PROTECTIVE COLORATION—PARASITIC MOLLUSCA—COMMENSALISM—VARIATION
Reading edition
Thus Limnaea involuta, which is almost universally regarded as a good and distinct species, has been held to be no more than a variety of L. peregra produced by locality; see Zoologist, 1889, p. 154.