Chromosome Number and Distribution of Solanum aviculare Forst. and S. laciniatum Ait. By G. T. S. Baylis 639–643 A Check List of the Marine Algae of the Dunedin District By Margaret Naylor 645–663 Introductory Note to Cyto-Taxonomic Studies of New Zealand Ferns By G. Brownlie 665–666 Fossil Leaves, Fruits and Seeds from the Wanganui Series (Plio-Pleistocene) of New Zealand By D. R. McQueen 667–676 Thelephoraceae of New Zealand. Part IV. The Genus Vararia. By G. H. Cunningham 973–985 The Genus Albugo in New Zealand By Shirley D. Baker 987–993 CHEMISTRY A Study of the Growth of Dhar Yeast in Cultures Containing Ethyl Alcohol as Source of Carbon and Different Ammonium Salts as Source of Nitrogen, Under Non-aerated Conditions By K. Bahadur 219–221 GEOLOGY The Nature and Alteration of Some Triassic Sediments from Southland, New Zealand By D. S. Coombs 65–109 An Upper Triassic Lamellibranch from the Southern Alps of North Westland, New Zealand (Sheet S53) By C. A. Fleming, F. W. Munden and R. P. Suggate 111–114 The Petrography of Some Jurassic Conglomerates at Kawhia, New Zealand By Helen A. H. Macdonald 223–230 The Relative Pleistocene Chronology of the South Kaipara District, New Zealand By R. N. Brothers 677–694 Note on New Zealand Crustal Structure By K. E. Bullen 995–999 Sohfluxion and Periglacially Modified Landforms at Wellington, New Zealand By C. A. Cotton and M. T. Te Punga 1001–1031 The Oretian Stage of the New Zealand Triassic System By J. D. Campbell 1033–1047 Kapitean (Upper Miocene) Mollusca from Te Waewae Bay, Southland, New Zealand. By C. A. Fleming 1049–1059 The Petrology of the Arahura and Pounamu Series in the Kokatahi River, North Westland. By Brian Mason and S. R. Taylor 1061–1070