Acknowledgments My thanks are due to the University of New Zealand for a grant towards travelling expenses, the Government Marine Department and Captain Black of Dunedin for the provision of boat transport and the D.S.I.R., Botany Division, for the identification of specimens. Also to Mr. Aukaha for hospitality in the Maori village on Motiti Island, Mr. and Mrs Parkin, wild-life wardens, for hospitality on Little Barrier Island, Mr. Fraser, fisheries officer, for organising boat transport in Bay of Plenty and accommodation in the Mayor Island Big Game Fishing Camp, Messrs Traill and Sharpe, wild-life rangers, for conducted tours of the Stewart Island and Otago Peninsula habitats, and Mr. Bailey, for information relating to shags on Mayor Island. References Boyce, S. G., 1954. The Salt-spray community Ecol Monog 24 1 pp. 29–67. Gillham, M. E., 1959a Vegetation of tern and gannet colonies in Northern New Zealand. Trans. Roy Soc. NZ. ——1959b Vegetation of Little Brother Island, Cook Strait, in relation to spray-bearing winds, soil salinity and pH Trans. Roy Soc. N. Z.. Guthrie-Smith, H, 1914. Mutton birds and other birds, Christchurh. Oliver, W. R. B., 1930. New Zealand Birds, Wellington.