BY R. H. CAMBAGB. 435 



climate, this species, though common on the shale at an altitude 

 of 2200 feet, is, so far as I know, entirely absent from the same 

 formation between Parramatta and Penrith, which averages 

 something over 100 feet above sea-level. It is also absent from 

 the basaltic hills around Bowral. 



This species has a limited range in New South Wales so far as 

 is known at present, being almost confined to the plateau between 

 Groulburn and Mittagong. Its most northern point known to me 

 is The Oaks, near Pic ton, where a few trees are growing on the 

 Wianamatta Shale at an elevation of about 1000 feet above sea- 

 level. These particular trees have less of the woolly bark than 

 is usually found on the species, and for the most part are covered 

 with a fairly smooth gum tree bark, though hard and flaky near 

 the base, with a very little fibre. The variability in the extent 

 of the fibrous bark on many trees of the genus provides an 

 interesting study. 



In January, 1902, some trees were noticed by me from the 

 train in Tasmania between Deloraine and Chudleigh Junction 

 which were suggestive of the Bowral species, specimens being 

 afterwards collected by Mr. Maiden and recorded as E. Macar- 

 thuri.* That it should occur at such widely separated spots at 

 once provides an extensive field for speculation as to the method 

 of its distribution and the age of the species. The subject, how- 

 ever, involves many questions which cannot be disposed of with- 

 out years of observation and close study, assisted by the geologist 

 and physiographer as well as students of other natural science 

 subjects. 



E. Macarthuri is of interest from an economic point, as, accord- 

 ing to Mr. H. G. Smith, F.C.S., the leaves contain a large per- 

 centage of geraniol. " The oil obtained from this species has no 

 resemblance to ordinary Eucalyptus oil, and belongs to none of 

 the well defined groups of these oils.'"'f 



Another interesting tree around Bowral is E. regnans F.v.M. 

 (E.Jastigata Deane & Maiden), the giant gum of Gippsland or at 



* Papers and Proc. Royal Society of Tasmania, 1902, p. 83. 

 f Journ. and Proc. Royal Society of N. S. Wales, 1900, p. 143. 



