794 NOTES ON THE NATIVE FLORA OF NEW SOUTH WALES, II., 



In connection with this matter, the effect of the Great Dividing 

 Range is evident, this forming, especially towards the south, a 

 cold barrier between the eastern and western floras, but it is 

 interesting to note that these floras mingle on the highlands 

 towards Queensland, where the heat of the northern latitudes is 

 tempered by the increased elevation over coastal and western 

 areas. 



Owing to this influence, Eucalyptus melaaophloia (the Silver- 

 leaved Ironbark), whose most southern locality known to me is 

 near Narromine, finds its way past Bingara and Warialda right 

 across the tableland on to the Upper Clarence, as well as extend- 

 ing into Queensland. 



These examples will be suflicient to show that it would be 

 instructive to select any typical northern tree and study it 

 throughout its southerly extension, especially with a view to 

 noting any variation that might take place throughout its range. 



Our ornithologists and ichthyologists would also find an 

 interest in this feature, as I have seen several of the western 

 birds on the Upper Clarence nearly 20 years ago, and before the 

 influence of civilization and drought had disturbed them, among 

 others being the black and white butcher bird, Cracticus nigri- 

 gularis, Gould. There is also a fish in the upper Clarence and 

 Richmond waters which appears to be identical with the Murray 

 Cod {Oligorus sp.), and which does not, so far as I know, occur 

 in any coastal rivers south of the Clarence. 



Sterculia diversifolia, G. Don, the Currajong, so well known 

 as a fodder tree, was not noticed between Inverell, Tingha and 

 Guyra, so is evidently scarce in the locality. This is probably 

 owing to the altitude of those places, as the Currajong thrives 

 better at levels below 2000 feet. 



From Tingha to Guyra is a distance south-easterly of 40 miles, 

 the country rising from about 2600 feet to 4300 feet above sea- 

 level. The intervening country is chiefly made up of granite and 

 basalt, the latter in many cases forming part of the high table- 

 land, and not being too prolific in botanical specimens. The mile- 

 posts mentioned for purposes of reference start from Inverell, 

 number 16 being at Tingha. 



