Some Effects of Imported Animals on the Indigenous Vegetation. By B. C. Aston, F.I.C., F.C.S.

Note on Helichrysum fasciculatum Buchanan. By T. F. Cheeseman, F.L.S.

Note on the Species of Hydra found in New Zealand. By G. Archey.

Additions to the Fish Fauna of the Kermadec Islands. By Edgar R. Waite, F.L.S.

The Action of Alkyl Iodides on Copper-oxide. By H. G. Denham, M.A., D.Sc., Ph.D.

The Nature of Gamma Rays. By Professor T. H. Laby and P. W. Burbidge, B.Sc.