and it would be difficult to prove the truth of the proposition, for every now and then even a living animal, as the Lepidosiren, is discovered having affinities directed towards very distinct groups.
Ohar hau, dudarik ez, aro geologikoen abioan aldaketa handiak izan dituzten taldeetara mugatu beharra dago; eta zail legoke frogatzen proposamenaren egia, lantzean behin Lepidosirena bezalako animalia bizidun bat aurkitzen baita, talde oso ezberdinekin ahaidetasuna duena.