There has been considerable argument among the Roman augurs about the birds known as the "sangualis" and the "immusulus." Some persons are of opinion that the immusulus is the young of the vulture, and the sangualis that of the ossifrage. Massurius says,[1] that the sangualis is the same as the ossifrage, and that the immusulus is the young of the eagle, before the tail begins to turn white. Some persons have asserted that these birds have not been seen at Rome since the time of the augur Mucius; for my part, I think it much more likely, that, amid that general heedlessness as to all knowledge, which has of late prevailed, no notice has been taken of them.