Transactions of the Royal Society of New Zealand Volume 87 Published by the Royal Society of New Zealand Victoria University of Wellington, P. O. Box 196, Wellington, New Zealand Editor: J. T. Salmon, D.Sc., F.R.S.N.Z., F.R.E.S Associate Editor: C. A. Cotton, D.Sc., Hon. LL.D., A.O.S.M., F.G.S., F.R.S.N.Z. Parts 1 and 2 (Pages 1-187) Issued July, 1959 Parts 3 and 4 (Pages 189-361) Issued November, 1959 London Agent High Commissioner for New Zealand, 415 Strand, London, W. C. 2. Printed by Otago Daily Times and Witness Newspapers Co., Ltd., Dunedin, New Zealand