1. Adie, R. J., in Pacific Basin Biogeography (Bishop Museum Press, Honolulu, 1963).
2. Herdman, H. F. P., Disc. Rep., 25, 39 (1948).
3. Fell, H. B., Nature, 193, 759 (1962).
4. Deacon, G. E. R., Disc. Rep., 15, 1 (1937).
5. Brodie, J. W., Geol. Rundsch., 47, 662 (1958).