ciaced with abundance of foliage found by me at Geilston 

 quarry during my last visit, together with other fruits of 

 various genera, not yet described by Baron von Mueller, 

 to whom they have been referred. 



I have frequently seen impressions of A. Johnstonii in the 

 beds of the Launceston Tertiary Basin. 



The table of distribution prepared by me will give a more 

 comprehensive view of the links which relate the widely 

 separated deposits. 



I think much of the uncertainty spoken of by Victorian 

 geologists arises from association with the older classification. 

 Prior to the determination of vegetable remains the various 

 gold drifts were from very doubtful data assigned relative 

 positions as Oligocene, Miocene, Lower, Middle, and Upper 

 Pliocene, Alluvial and Post Pliocene. 



The newer classification merely substitutes other names 

 for those stated, giving the impression that the separate 

 names still represent different geological periods. I do not 

 think that the mere sequence of eruptive rocks should divide 

 periods. I am inclined to think upon palseontological 

 grounds that the majority of the leaf beds are of much older 

 date than is generally supposed. If we must decide between 

 Pliocene and Miocene, I should certainly, with Professor 

 McCoy, incline to the latter period. My confidence in this 

 opinion is increased, when I think of the immense amount of 

 valuable work performed by such men as Eev. J. E. Tenison- 

 Woods, Professor Tate, Professor McCoy, Professor Duncan, 

 Eobert Etheridge, jun., Baron von Miieller, and others. 



The former gentleman has up to the present time deter- 

 mined the greater part of our tertiary marine fauna, and the 

 latter the terrestrial flora. 



I agree with Mr. Woods in a statement recently made 

 before the Eoyal Society of New South Wales, that, although 

 " it was not easy to judge by the percentage system, as our 

 knowledge of the existing fauna is so imperfect, yet I think, 

 upon consideration, that the imperfection of this knowledge 

 has been exaggerated." 



I also agree with him that we know a good deal of" the 

 Corals, Foramenifera, Mollusca, and Flora, although there 

 is hardly time yet for the knowledge to be very widely 

 circulated. The splendid catalogue compiled by Mr. Eobert 

 Etheridge, jun., however, will speedily dispose of the latter 

 difficulty. 



Of tertiary marine testacese alone there are nearly 300 

 species described. Thirty new species were recently described 

 by myself in a paper read before this Society. 



Of the testacea only about five per cent, are known to exist. 

 This continual lessening of the percentage of living to extinct 



