BY R. H. CAMBAGE. 651 



originated by eartli-inovements or climatic changes, as well as by 

 the proximity of different geological formations. 



Percentage of Tasmanian Plants. 



Of about 210 species noticed around Boggabri, at elevations 

 from about 800-1,200 feet above sea-level, 36 % chiefly of the 

 smaller jilants, are recorded from Tasmania, which, considering the 

 disparity of climates, seems a fairly high percentage; while, on 

 the Nandewar Mountains, at altitudes varying from 3,000-5,000 

 feet, and with much greater similarity of climates, 60% of about 

 IGO species seen, occur in Tasmania. This affords an instructive 

 example of the regulating influence of climate on plant-distribution. 



It is also worthy of note that not a single Eucalypt, and only 

 one Acacia noticed around Boggabri, in a warm, fairly dry cli- 

 mate, are known to occur in Tasmania; while only two species were 

 found of each of these genera, which are common to both Tasmania 

 and the Nandewars. 



I wish to express my thanks to 'Mr. J. H. Maiden, F.L.S., and 

 l\rr. E. Betche, for assistance and corroboration in the identification 

 of a number of plants, and also to Mr. W. J. Markwell, of Mount 

 Tjindsay Station, for affording facilities to visit the Nandewar 

 Mountains. 



EXPLANATION OF PLATES. 

 Plate Ixvi. 

 Tangfilda or Barber's Pinnacle, Boggabri. 



Plate Ixvii. 

 Groups of M tlcdeuca bractt'Ua F. v.M., and Permo-Carboniferous(?) sand- 

 stone cliffs, Maule's Creek. 



