Literature cited. 1. Cossmann, M., 1917; in Marshall, P., Trans. N.Z. Inst., vol. 49, p. 462. 2. (a.) Finlay, H. J., 1923. Trans. N.Z. Inst., vol. 54, pp. 101–2. (b.) —— 1924. Proc. Mal. Soc., vol. 16, pp. 77–84. 3. —— and McDowall, F. H., 1923. Trans. N.Z. Inst., vol. 54, p. 113. 4. (a.) Hedley, C., 1921. N.Z. Jour. Sci. and Tech., vol. 3, pp. 54, 170. (b.) —— 1916. Proc. Linn. Soc. N.S.W., vol. 41, p. 716. 5. Hutton, F. W., 1873. Cat. Tert. Moll. N.Z. 6. (a.) Iredale, T., 1915. Trans. N.Z. Inst., vol. 47, pp. 417–508. (b.) —— 1915. Proc. Mal. Soc., vol. 11, pp. 297, 300, 303. (c.) —— 1917. Proc. Mal. Soc., vol. 12, p. 324. (d.) —— 1918. Proc. Mal. Soc., vol. 13, p. 30. 7. Marshall, P. 1919. Trans. N.Z. Inst., vol. 51, p. 245. 8. (a.) —— and Murdoch, B., 1919. Trans. N.Z. Inst., vol. 51, pp. 249, 255. (b.) —— 1920. Trans. N.Z. Inst., vol. 52, p. 132. (c.) —— 1921. Trans. N.Z. Inst., vol. 53, pp. 77–84. (d.) —— 1923. Trans. N.Z. Inst., vol. 54, p. 122. 9. (a.) Marwick, J., 1923. Aust. Assoc. Adv. Sci., vol. 16, pp. 316–31. (b.) —— 1923. Trans. N.Z. Inst., vol. 54, pp. 63–80. 10. May, W. L., 1918. Pap. and Proc. Roy. Soc. Tas., pp. 72, 114; pl. 10, fig. 14. 11. Oliver, W. R. B., 1923. Proc. Mal. Soc., vol. 15, p. 180. 12. Park, J., 1920. N.Z. Geol. Surv. Bull. No. 20., pp. 105, 106. 13. (a.) Suter, H., 1921. N.Z. Geol. Surv. Pal. Bull. No. 8, pp. 81, 82. (b.) —— 1920. Trans. N.Z. Inst., vol. 52, p. 368. 14. Tate, R., 1897. Proc. Roy. Soc. N.S.W., vol. 31, p. 396. Addendum. Most of this paper was written more than two years ago. Since then much new material, both Neozelanic and foreign, has come into my hands; also, I have much information that was not then available; and I now find that it will be imperative to create new groups for some of the species discussed. It is wiser to give a difficult species a niche of its own than attempt time and again to force it into genera which will not satisfactorily contain it. As it will be some years before all the various genera discussed can be treated separately, and confusion over these species will but increase during that time, I have decided to deal with some of the more urgent cases now, and herewith propose new genera for their reception. Incorporation of these in the paper would have necessitated so much alteration of the type that my earlier remarks have been allowed to stand, and the new names all brought together in a postscript. Inglisella n. gen. Type, Ptychatractus pukeuriensis Sut. Classed provisionally as a Brocchinia in the paper, this shell and its allies differ from that genus in the thin shell, different form of growth, discrepant sculpture, much straighter columella, and rather pronounced posterior notch in the outer lip just at the keel. The genus-name for these attractive little shells is with much pleasure given in honour of Dr. J. K. H. Inglis, of Otago University, in appreciation of his unfailing kindness and consideration. Maorivetia n. gen. Type, Turbinella brevirostris Hutt. The various previous locations of this shell in Turbinella, Peristernia, Taron, Latirus, Aphera, Leucozonia, and, finally, Bivetia, sufficiently attest