I will not, however, here give any instances, for I see hardly any way of distinguishing between the effects, on the one hand, of a part being largely developed through natural selection and another and adjoining part being reduced by the same process or by disuse, and, on the other hand, the actual withdrawal of nutriment from one part owing to the excess of growth in another and adjoining part.
Nik, hala ere, ez dut adibiderik emanen, ez baitut bide modurik ikusten honako bi ondoren hauen artean bereizteko, hots, alde batetik, hautespen naturalez asko garatu den organo baten eta prozesu berarengatik, edo erabilerarik ezagatik, murriztu den beste aldameneko organo baten ondorenaren eta, bestetik, aldameneko atal bat gehiegi haztearen ondorioz beste atal batetik elikadura erretiratzearen artean.