Turning to the Invertebrata, Barrande asserts, a higher authority could not be named, that he is every day taught that, although palaeozoic animals can certainly be classed under existing groups, yet that at this ancient period the groups were not so distinctly separated from each other as they now are.
Ornogabeengana etorriz, Barrandek dio-eta autoritate handiagorik aipatzerik ez dago-aurkikundeek egunero irakasten diotela, paleozoikoko animaliak bizidunen taldeen barruan sailka daitezkeen arren, antzinako aldi hartan taldeak ez zeudela egun bezain argi bereizirik bata bestearengandik.