18 R. H. CAMBAGE. 



Before vacating the Presidential Chair I would like to 

 express my gratitude, and also that of the Society, to the 

 Honorary Secretaries, Mr. J. H. Maiden, f.l.s., and Pro- 

 fessor Pollock, d.Sc, as well as to the Honorary Treasurer 

 Mr. D. Garment, f.i.a., and the Acting Honorary Treasurer 

 Assistant Professor Chapman, m/d., for the valuable service 

 which they have rendered to the Society in looking after 

 its best interests. It is during a President's year of office 

 that he finds how many matters have to be attended to by 

 these honorary officers, and I desire to record my personal 

 appreciation of their united assistance to the Council in 

 successfully guiding the Society's affairs during the past 

 year. 



Development and Distribution of the Genus Eucalyptus. 



Among the various fragments of evidence which are 

 available to assist us in writing up the climatic, physio- 

 graphic, and to some extent the geological history of 

 Australia from early Tertiary up to the present day, that 

 supplied by a study of the development and distribution of 

 the genus Eucalyptus should be amongst the most impor- 

 tant, seeing that with the exception of a few species found 

 in the islands to the north, the genus is wholly Australasian. 

 The subject is a gigantic one, and in this address I only 

 propose to briefly outline some of the features of distribu- 

 tion which apply more particularly to South Eastern 

 Australia. 



At the outset I wish to express my indebtedness to Mr. 

 E. C. Andrews, for much useful information obtained during 

 many conversations, and also from his writings in regard 

 to physiographic changes in Eastern Australia. 1 I have 

 also to acknowledge valuable help on the general subject 



1 " Geographical Unity of Eastern Australia," E. C. Andrews, b.a., 

 this Journal, Vol. xliv, p. 420, (1910). 



