And we are led to this conclusion, which has been arrived at by many naturalists under the designation of single centres of creation, by various general considerations, more especially from the importance of barriers of all kinds, and from the analogical distribution of subgenera, genera, and families.
kontuan hartzen badugu, eta oso kontuan hartzeko gogoeta da hau, espezieak zein sarri hedabanatu ahal izan diren etengabe eremu zabal batean zehar, eta, ondoren, bitarteko guneetan iraungi; hori guztiori kontuan hartzen badugu ez dagoela oztopo gaindiezinik hau onartzeko: espezie beretako banako guztiak, dauden lekuan daudela, guraso komunengandik datozela.