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Award of the Hutton Memorial Medal.
1911. W. B. Benham, K.B.E., M.A., D.Sc., F.R.S., F.R.S.N.Z.—For researches in New Zealand zoology.
1914. L. Cockayne, C.M.G., Ph.D., F.R.S., F.L.S., F.R.S.N.Z.—For researches in the ecology of New Zealand plants.
1917. P. Marshall, M.A., D.Sc., F.G.S., F.R.S.N.Z.—For researches in New Zealand geology.
1920. J. E. Holloway, L.Th., D.Sc., F.R.S., F.R.S.N.Z.—For researches in New Zealand pteridophytic botany.
1923. J. A. Thomson, M.A., D.Sc., F.G.S., F.R.S.N.Z.—For researches in geology.
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1926. C. Chilton, M.A., D.Sc., LL.D., M.B., C.M., F.L.S., F.R.S.N.Z.—For his continuous researches on the amphipodous crustacea of the Southern Hemisphere.
1929. G. V. Hudson, F.E.S., F.R.S.N.Z.—For research in entomology.
1932. J. A. Bartrum, M.Sc., F.R.S.N.Z.—For researches in geology.
1935. G. H. Cunningham, D.Sc., F.R.S.N.Z.—For research in mycological botany.
1938. David Miller, Ph D., M.Sc., F.R.S.N.Z., F.R.E.S., F.L.S.N.S.W.—For researches in entomology.
1941. H. H. Allan, M.A., D.Sc., F.R.S., F.R.S.N.Z.—For botanical researches.
1944. W. N. Benson, D.Sc., F.R.S., F.R.S.N.Z.—For researches in New Zealand geology.