BY T. GRIFFITH TAYLOR. 529 



Postscript (added 28th September, 1906) — As regards the 

 Geocol and its effect on the flora, Mr. J. H. Maiden, F.L.S., 

 Government Botanist, has informed me that the flora of the 

 Hunter-Goulbuin Valley exhibits features of interest in this 

 connection. A number of genera of plants, otherwise confined 

 to the western side of the Divide, have apparently migrated over 

 the Geocol, and form an isolated plant settlement in the littoral 

 province of New South Wales. Among these may be mentioned 

 such important examples as Geijera parviflora (Wilga), Acacia 

 salicina and Casuarina Luehmanni (Bull-Oak). Hence it would 

 seem to be justifiable to assign an important r61e to the Cassilis 

 Geocol in the geographical distribution of plant-life. 



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