IN 1904 Dr. J. R. Ashworth and I published in the Proceedings of the Royal Society of Edinburgh (vol. xxv., p. 1) observations on aged individuals of Sagartia troglodytes then and still in the possession of Miss Jessie Nelson in Edinburgh. After eight years these anemones are still in excellent health, having been in captivity for considerably more than half a century. In one respect I fear that we did them an injustice, namely in attributing cannibalism to them, the error being probably due to the observation of the birth of young from a parent the tentacles of which were not fully expanded. Recently I chanced to notice a young Sagartia attached to a small piece of seaweed floating free in the aquarium. A slight agitation of the water was sufficient to bring the young anemone in contact with the tentacles of one of the patriarchs of its own species. They immediately closed round it and a small part of the disk became emarginate. The greater part, however, was not sensibly affected, and the mouth remained closed. In less than two minutes the folded-in tentacles uncurled and the young anemone was thrust away with some force. It then came in contact with the tentacles of a second old Sagartia, and exactly the same thing occurred. Neither the young one nor the tentacles that had held it were apparently affected in any way. Immediately after the first old Sagartia had released the young one, I dropped on its tentacles, in the region which had temporarily been affected by contact with the latter, the body of a small isopod. The isopod was seized in exactly the same manner that the young anemone had been seized, but the movements soon spread to other tentacles, the mouth gaped open, and the isopod was swallowed. In other individuals of the same species I have noticed that small masses of food, such as this little isopod, remain apparently unobserved if dropped gently on to the disk within the tentacles without touching them, but that if the tentacles are then touched and in the movements that ensue come in contact with the food lying neglected on the disk, its presence is apparently realised and it is swallowed.