so that here, unless we believe that these eminent naturalists have been misled by their imaginations, and that these late tertiary species really present no difference whatever from their living representatives, or unless we admit, in opposition to the judgment of most naturalists, that these tertiary species are all truly distinct from the recent, we have evidence of the frequent occurrence of slight modifications of the kind required.
kasu honexetan daukagu, beraz, behar den motako eraldaketak gertatzen direlako froga, uste izan ezean naturalista bikain hauek irudimenak okerreko bidetik eraman dituela eta goi-tertziarioko espezie hauek ez dutela benetako alderik gaur bizi diren beren ordezkariengandik, edo naturalista gehienen eritziaren kontra, tertziarioko espezie hauek guztiok modernoetatik benetan ezberdinak direla onartu ezean behintzat.