and we have seen that with plants it is those which have the widest range, that oftenest present varieties, so that, with shells and other marine animals, it is probable that those which had the widest range, far exceeding the limits of the known geological formations in Europe, have oftenest given rise, first to local varieties and ultimately to new species;
eta ikusi dugu landareen artean heda-eremurik zabalena dutenak direla aldakiak sarrien erakusten dituztenak;