It is well known that several animals, belonging to the most different classes, which inhabit the caves of Carniola and of Kentucky, are blind. In some of the crabs the foot-stalk for the eye remains, though the eye is gone; — the stand for the telescope... The Origin of Species by Means of Natural Selection: Or, The Preservation of ... - Página 144 por Charles Darwin - 1889 Vista completa -
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