Acknowledgments

This study has been carried out while the writer has been holding Nuffield and N.Z.U Research Grants, which she gratefully acknowledges.

The work has depended extensively on identification of species by a number of workers on systematic groups. To these the writer expresses her warm thanks. They include Miss B. I. Brewin (ascidians), Dr. D. A. Brown (Bryozoa), Professor V. J. Chapman (Cyanophyceae), Mr. R. Dell, Dr. C. Fleming, and Mr. A. W. B. Powell (molluscs), Dr. H. B. Fell (echinoderms), Dr. D. E. Hurley (amphipods, isopods), Mr. G. A. Knox (polychaets), Mr. J. Moreland (fish), Dr. J. Murray (lichens), Dr. M. Naylor (sea weeds), Dr. G. A. Parry (anemones), Miss P. R. Ralph (hydroids), and Mrs. S. Rind (sponges). She also thanks the station staff (Mr. R. Stark, Mrs. R. Milne, Mrs. A. J. Black and Mr. D. McArthur) for their share of weather recording.

She is especially indebted to Dr. Naylor, Miss Ralph and Mrs. Rind for extensively making available information on their groups, often before their own work was published.