50 R H. CAMBAGE. 



If the extreme or parallel type of venation had been 

 evolved in Eocene or early Miocene time, then it would 

 seem not unlk ely that the genus originated as far back as 

 towards the close of the Cretaceous, though its occurrence 

 in Europe in Cretaceous or Tertiary time seems most 

 improbable as already pointed out by Mr. Deane. 1 



Mr. R. M. Johnston has described two species of 

 Eucalyptus from fossil leaves found in Tasmania, one, E. 

 Kaijseri from Mount Bischoff, and the other, E. Milligani 

 probably from Macquarie Harbour. 2 From the drawings, 

 these both belong to the transverse venation type, and this 

 implies that Eucalypts, having leaves with this class of 

 venation had extended south to latitude 42° in Eocene or 

 Miocene time, or about 4° beyond where living examples 

 of this type are found to day. In his Presidential Address 

 to the Linnean Society Mr. Deane referred to this phase of 

 distribution, owing to the warmer early Tertiary climate, 

 and said: — "Taking into consideration the difference 

 between the Eocene and Miocene climate and that of the 

 present period, we might expect to find existing types a 

 few degrees further south in the fossil state." 3 



Mr. Chapman has also kindly shown me a Tertiary fossil 

 leaf with the oblique venation, probably a Eucalypt, from 

 near Burnie in Tasmania. 



The leaves described by Ettingshausen as Eucalypts, from 

 Miocene beds at Emmaville (Vegetable Creek) in latitude 

 29|-°, include those with both the transverse and oblique 



venations, the former predominating. 4 



» 



1 Proc. Linn. Soc. N. S. Wales, Vol. xxv, p. 463, (1900). Also, " Flora 

 of the Amboy Clays," by J. S. Newberry, Monographs U.S. Geol. Survey, 

 Vol. xxvi, p. 46, (1895). 



2 " Geology of Tasmania," by Robt. M. Johnston, f.l.s., (1888). 



3 Proc. Linn. Soc. N.S. Wales, Vol. xxi, p. 832, (1896). 



4 Memoirs of the Geological Survey of N.S. Wales, Palaeontology No. 2, 

 Tertiary Flora of Australia by Dr. Constantin, Baron von Ettingshausen, 

 (1888.) 



