Contents Botany A “Loose-lying” Form of the Brown Alga Hormosira By L. B. Moore 48–53 New Species of New Zealand Bryophytes By K. W. Allison 93–96 The Epiphytic Orchids of New Zealand and a New Species of Pterostylis from Mount Egmont By Edwin D. Hatch 101–105 Some Aspects of the Life History of the Liverwort Symphyogyna hymenophyllum (Hook.) M. et N. By Margaret K. Finlayson 280–290 Studies of New Zealand Nothofagus. 1. Taxonomy and Floral Morphology By A. L. Poole 363–380 The Bryophytes of Stewart Island, Part III. By William Martin 485–501 Studies of the New Zealand Nothofagus Species. By A. L. Poole 502–508 Root System of the New Zealand Mangrove. By G. T. S. Baylis 509–514 Chemistry The Reaction of Hydrogen Chloride with Dry Proteins. Part I—Collagen By R. W. Green 291–300 Geology An Eroded Coastline By R. Speight 3–13 Some Unusual Shore Platforms near Gisborne, North Island, New Zealand By Edmund D. Gill 64–68 Spilites, Serpentinites and Associated Rocks of the Mossburn District, Southland By J. J. Reed 106–126 The Geology of the Mokohinau Islands, North Auckland By C. A. Fleming 255–268 An Intrusion of Porphyrite near Waihao Forks, South Canterbury By A. C. Amies 271–279 Two New Zealand Rivers Following Tertiary Transverse Furrows By A. R. Lillie 329–341 Antlerite, from Takitimu Mountains, New Zealand By C. Osborne Hutton and J. D. McCraw 342–343 Stream Patterns in the Greymouth District. By Maxwell Gage 418–425