BY R. H. CAMBAGE. 651 



originated by earth-movements or climatic changes, as well as by 

 the proximity of different geological formations. 



Percentage of Tasmanian Plants. 



Of abont 210 species noticed aronnd Boggabri, at elevations 

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

 smaller plants, 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 

 100 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 

 Mr, E. Betehe, for assistance and corroboration in the identification 

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

 Lindsay Station, for affording facilities to visit the Nandewar 

 Mountains. 



EXPLANATION OF PLATES. 



Plate Ixvi. 

 Tangfilda or Barber's Pinnacle, Boggabri. 



Plate Ixvii. 

 Groups of MelahucahracU'ita F.v.M., and Permo-Carboniferous(?) sand- 

 fctone clififs, Maule's Creek. 



