TOPOGRAPHICAL, ECOLOGICAL AND TAXONOMIC NOTES. 287 



Fig. 5. Plan of Fig. 6. 



Fig. 6. Crystal 3; clinographic drawing, ideal. 



Plate VI. 

 Fig. 1. Plan of Fig. 2. 



Fig, 2. Crystal 15; clinographic drawing, ideal. 



Fig. 3. Crystal 8; orthographic projection on plane of a and c 

 axes, ideal. 



Fig. 4. Crystal 17; orthographic projection of plane of a and c 

 axes, ideal. 



Fig. 5. Stereogram; the doubtful forms D (T04) and /x "05 are 

 included (the zone circles by so- and who- are inadver- 

 tently omitted with drawing). 



TOPOGRAPHICAL, ECOLOGICAL, AND TAXONOMIC 



NOTES ON the OCEAN SHORELINE VEGETATION 



OF the PORT JACKSON DISTRICT. 



By A. A. Hamilton. 



Botanical Assistant, Botanic Gardens, Sydney. 

 [With Plates VII - XIII.] 



[Read before the, Royal Society of N. S. Wales, October 3, 1917.'] 



The floristic region reviewed in these notes runs coastally 

 from Turrimetta Head to Port Hacking, and stretches 

 inland a few hundred yards from the Pacific Ocean. Within 

 this zone we have the customary strand, alternating with 

 bluff headland and rocky escarpment. At the rear of the 

 various beaches sand-dunes rise into more or less steeply 

 graded embankments of varying height, with, usually, an 

 uneven plateau above extending to a valley running parallel 

 to the beach, and which is sooner or later excavated by 

 atmospheric pressure, the rearward slopes continuing until 



