Yet he who objected to consider as intermediate the extinct genera, which thus link together the living genera of three families, would be partly justified, for they are intermediate, not directly, but only by a long and circuitous course through many widely different forms.
Hala ere, hiru familiatako generoak horrela lotzen dituzten genero iraungiak bitartekotzat hartzearen kontra legokeenak, aldez bederen, arrazoi luke, zeren, bitartekoak, izan, zuzenean barik, forma oso ezberdin askotatik pasatzen den bide luze eta bihurgunetsu baten bitartez baitira.