491 



odour indicating an oil cf the pinene-cineol group. The 

 amount of cineol was small — certainly not more than 15 per 

 cent, of that constituent being present. The saponification 

 number for the esters and free acids was 22' 1, which, for an 

 alcohol belonging to the C 10 H 17 OH series, in combination with 

 .acetic acid, represented 7*7 per cent, of ester. The odour of 

 the separated oil was not distinctive and did not indicate 

 geraniol, so that the identity of the alcohol is at present in 

 ■doubt. 



The crud# oil had specific gravity at 15° C. =0*9041; 

 rotation, a D + 6'3°; refractive index at 20° = 1*4789, and was 

 ■scarcely soluble in 10 volumes 80 per cent, alcohol. 



The small amount of oil at our disposal did not permit 

 more extensive work being done upon it, and distillation 

 results could not be obtained. The species has no value as an 

 •oil-producing tree, the yield of oil being so small. 



29. Eucalyptus cob.ia.cea, A. Ciinn. (Schau. in \Ydlp. 

 Rep., ii., 925). 



"'Cabbage Gum." 



This species appears to be restricted to the South-eastern 

 "portion of the State, near the coast. Sufficient research has 

 not yet been undertaken to determine definitely this South 

 Australian tree's relationship with E. pJilebopkylla; so that 

 until this is ascertained, it is impossible to say which data 

 given under the two species in the botanical and chemical 

 descriptions in "Eucalypts and their Essential Oils," p. 179, 

 .and "Eucalypts of Tasmania and their Essential Oils," p. 27, 

 respectively belong to the South Australian Eucalypt. 



30. Eucalyptus corynocalyx. F. v. M. ("Frag." ii., p. 43). 



"Sugar Gum." 



Mueller, when describing this Eucalyptus in 1860 gave 

 it this name, which was acknowledged by Bentham in his 

 "Flora Australiensis," vol. iii., p. 218 (1886). It appears, 

 however, that in 1852 Mueller had already described the 

 same species under the name of E. cladocalyx, but discards 

 this for E. corynocalyx in his "'Eucalyptographia," 1879, and 

 Bentham follows his wishes. He must evidently have had 

 some sound reasons for such alteration of nomenclature, and 

 now that the name E . corynocalyx runs through Eucalvptus 

 literature of the last fifty years we have decided to fall into 

 line with the author's wishes and use E . corynocalyx, and not 

 -exhume the name of E . cladocalyx. 



