Thus, as it seems to me, the leading facts in embryology, which are second to none in importance, are explained on the principle of variations in the many descendants from some one ancient progenitor, having appeared at a not very early period of life, and having been inherited at a corresponding period.
Hortaz, enbriologian egitate nagusi ditugunak, beste ezeinen atzetik ez daudenak garrantziari dagokionean, honako hastapen honek dioenaren arabera azaltzen dira nire eritziz: antzinako gurasolehenen baten ondorengo askorengan izaniko eraldaketak bizitzako aldi ez hain goiztiarrean agertu direla eta dagokien adinean heredatu direla.