president's address. 769 



rounded quartz pebble drift of probably Pliocene age, and deposits 

 of black flood loam of recent origin." 



Wo. West Silurian County. 



This consists of the Western Plains, in which Silurian rocks 

 predominate. See the geological map already quoted. 



Bounded by the Cretaceous and Cainozoic counties, and south- 

 east by a conventional line that joins Narrandera and Dubbo. 



WJf.. Cretaceous County. 



It consists of Lower Cretaceous areas, with a few patches of 

 Upper Cretaceous or Desert Sandstone. See the geological map 

 already referred to. 



The boundaries are Queensland on the north and South Aus- 

 tralia on the west; and, on the south, parallel 31° and the Darling 

 and Macquarie Rivers; on the east, a conventional line from 

 Dubbo north to Coonamble and thence north-west to Boggabilla. 



This subdivision, if tested, will at least prove if the Cretaceous 

 has any special flora. 



c. — Botanical Records arranged Topographically. 



I submit a number of readily accessible papers arranged for 

 the purposes of a botanical survey. I do not suggest that the 

 list is exhaustive; one of our young members might readily make 

 it so. Publications of this character might suitably be published 

 in a separate series, after the fashion of the " Records of the 

 Botanical Survey of India." 



El. Monaro County. 



Maiden, J. H. — A List of Plants collected by Mr. Richard Helms 

 in the Australian Alps. February, 1(S93. Agric. Gazette, 

 N..S.W.Y. 836. 



—The Flora of Mt. Kosciusko. Ih. ix. 720. 



— A Second Contribution towards a Flora of Mt. 



Kosciusko. lb. X. 1001. 



