BY A. A. HAMILTON. 511 



31. Oliver, F. W., and Salisbury, E. J. — Vegetation and Mobile 



I tround as illustrated by Suacda Jrulicosa. Jonrn. of Ecology, i., 

 p.249. 



32. Olsson-Skffer, P. — Hydrodynamic Factors Influencing Plant-life 



on Sandy Sea Shores. New Phytologist, viii., 1909, p. 37. 



33. Relation of Soil and Vegetation on Sandy Sea Shores. 



Botanical Gazette, xlvii., 1909, p. 85. 



34. Pegg, Miss E. J. — An Ecological Study of some New Zealand Sand- 



dune Plants. Trans, and Proc. N.Z. Inst., xlvi., 1914, p. .150. 



35. Rees, Bertha — Longevity of Seeds and Structure and Nature of Seed 



Coat. Proc. Roy. Soc. Vic, xxiii. (N.S.), 1911, p.393. 



36. Sherff, Earl E. — The Vegetation of Skokie Marsh. Botanical 



Gazette, liii., 1912, p. 415. 



37. Schimper, A. F. W. — Plant Geography upon a Physiological Basis. 



Eng. Translation. 



38. The Food of Australian Birds. Science Bulletin, No. 15, 1918. 



(Dept. of Agriculture, N.S.W.). 



39. Transeau, E. N. — The Vegetation of Cold Spring Harbor, Long 



Island. The Plant World, xvi., 1913, p. 189. 



40. Warming, E. — Oecology of Plants. English Translation, 1909. 



41. Whitford, H. N. — The Vegetation of the Lamao Forest Reserve. 



Philippine Journ. of Science, i., 1906. pp.373 and 637. 



EXPLANATION OF PLATES. 

 Plate xvii. 

 Fig. 1. — Saltmarsh fringed by a band of reeds (Clad in m j mice ion and 

 Jnncns maritimus vary. Salicornia meadow in the middle dis- 

 tance. Buffalo Creek, Lane Cove River. 

 Fig. 2. — Parallel bands of Jnncns and Cladium lining the marsh. 

 Jnncns in the tidal zone. Buffalo Creek. 



Plate xviii. 

 Pig. 3.— Jnncns (drooping tufts) in tidal zone. Cladium (erect) on 

 bank in swampy soil with reduced salinity. Buffalo Creek, Lane 

 Cove River. 



Pig. 4. — Intrusion of a /uncus formation by the Cladium along the 

 course of a fresh water drainage channel, Buffalo Creek. 



Plate xix. 

 Pig. 5. — Salt-grass (Sporobolus virginicus) showing luxuriant growth 



in response to reduced soil salinity. Buffalo Creek, Lane Cove 



River. 

 Fig. 6. — Debilitated culms of the Salt-grass prostrate on the sterile 



plain, the result of extreme soil salinity. Cook's River. 



