C—l3.

No. 12. Tongue of sand in lee of prostrate shrub (Coprosma acerosa) on stony desert, south of Wanganui. [Photo L. Cockayne.

No. 10. Foreshore, Caroline Bay, Timaru, formerly gravelly, nowcovered with sand. Embryonic dune built by planting MesemBRIANTHEMUM. Photo L. Cockayne.

No. 9. Sand-plain in which drifting sand is being fixed by Carex pumila. Wind-channel and wrecked dunes in centre. [Photo W. H. Field.

No. 11. Conversion of dune-complex into wandering dune, which is advancing burying hills and adding to its volume. [Photo L. Cockayne.