Insects 1. Almquist, S. 1973. Habitat selection by spiders on coastal sand dunes in Scania, Sweden. Entomol. Scand. 4,134-154. 2. Ardo, P. 1957. Studies in the marine shore dune ecosystem with special reference to the dipterous fauna. Opusc. Entomol. Suppl. 15, 1- 255. 3. Boomsma, J.J. & Van Loon, AJ. 1982. Structure and diversity of ant communities in successive coastal dune valleys. J. anim. Ecol. 51, 957- 974. 4. Callan, E. McC. 1964. Ecology of sand dunes with special reference to the insect communities. In Ecological Studies in southern Africa (ed. J.H. Davis), 174-185. W. Junk, The Hague. 5. Cheng, (ed) 1976. Marine insects. North Holland Publ. Co., Amsterdam, 581 pages. 6. Dobson, T. 1976. Seaweed flies (Diptera: Coelopidae. etc.). In Marine insects (ed. L. Cheng), 447 -463. North Holland Publ. Co., Amsterdam. 7. Dower, M. 1965. Fourth wave: the challenge to leisure. Civic Trust, London, 123 pages. Doyen,J.T.1976. Marine beetles (Coleoptera excluding Staphylinidae). In Marine insects (ed. L; Cheng), 497 -519. North Holland Publ. Co., Amsterdam. 8. Duffey,E. 1968. An ecological analysis of the spider fauna of sand dunes. J: anim. Ecol. 37,641-674. 9. Gray, J.S. 1967. Substrate selection by the archiannelid Protodrilus hypoleucus Armenante. J. exp. mar. Biol. Ecol. 1,47-54. 10. Griffiths, C.L. & Griffiths, R.J. 1983. Biology and distribution of the rove beetle Psammathobledius punctatissima (Le Conte) (Coleoptera: Staphylinidae). Hydrobiol. 101,203-214. 11. Moore, I. & Legner, E.F. 1976. Intertidal rove beetles (Coleoptera: Staphylinidae). in Marine insects ( ed. L. Cheng), 521- 551. North Holland Publ. Co., Amsterdam. 12. Perttula, T. 1984. An ecological analysis of the spider fauna of the coastal sand dunes in the vicinity of Tvarrunine Zoological Station, Finland. Mem. Soc. prod. fauna flora Fennica 60,11-22. 13. Roth, V.D. & Brown, W.L. 1976. Other intertidal air-breathing arthropods. In Marine insects (ed. L. Cheng), 119-150. North Rolland Publ. Co., Amsterdam.