As two men have sometimes independently hit on the same invention, so in the several foregoing cases it appears that natural selection, working for the good of each being, and taking advantage of all favourable variations, has produced similar organs, as far as function is concerned, in distinct organic beings, which owe none of their structure in common to inheritance from a common progenitor.
Nola batzuetan bi gizon nor bere aldetik aurkikunde berera heldu izan diren, halaxe arestian jarririko kasu ezberdinetan, badirudi hautespen naturalak, izaki bakoitzaren onerako jokatuz eta aldakuntza faboragarri guztietatik abantaila ateraz, izaki organiko ezberdinetan antzeko organoak sortu dituela funtzioari dagokionez, organook arbaso komun baten herentziari ezer zor ez diotelarik.