Observations on Some Aged Specimens of Sagartia Troglodytes, and on the Duration of Life in Cœlenterates

We have, during the last two years, made a series of observations upon specimens of Sagartia troglodytes which are at least fifty years old, and have thought it worth while to give a somewhat detailed account of these, as, so far as we can ascertain, there is only one other recorded case of longevit... View More