Mr. Clarke's Communication, ^c. 107 



bed containing the plants at the bottom of the pit^ but that 

 such specimens as liacl been made use of as a geological 

 ai'gument might tumble in from the coal beds in the upper 

 part of the pit, and fall to the lower part, composed of the 

 mountain limestone beds, every hour of the day ; and might 

 be brought up, like any other extraneous matter, in the way 

 in which the fragment in question had. iSIr. Clarke's final 

 phrase, in answer to some remonstrance of !Mr. Selwyn, 

 who found the arguments which he had accepted in 

 the morning entirely without foundation, being his often re- 

 peated one, ''that nevertheless he was quite satisfied they were 

 all of one age." This phrase Mr. Clarke continually used in 

 ■writing to English geologists on the e\-idence afforded by his 

 strati graphical sections, until at my suggestion pushed to 

 give an accurate representation of any actual case in point, 

 instead of vague assertions, when it proved that he had not a 

 single section in support of his view, and even up to 

 February last he had not been able to find one either in New 

 South Wales, Victoria, or Tasmania. 



As to the Bacchus ]Marsh and Darley sandstones, I have 

 not yet seen perfectly decisive specimens from them of the 

 Glossopteris , hut there are abundance of fronds of anew genus*, 

 to which belongs the plant I have figured from the New 

 South Wales coal beds under the name of Cijclopteris(?J 

 angustifolia, which occurs there, as well as in India, with 

 the Glossopteris, and has exactly the same geological 

 significance as the Glossopteris for the Bacchus Marsh 

 sandstones, in Avhich the C. (?) angustifolia is distinctly 

 present. 



In conclusion, I feel that some apology is due to the Society 

 for occupying so much time, but at the same time I 

 would remind the members that I said all I had got 

 to say on the discovery of the T(eniopteris Daintreei, and 

 its geological significance, which I considered worth saying, 

 in less than five minutes at our last meeting ; to which I Avill 

 add, that I shall be the first to communicate to the public, 

 tlirough the Society, any fact which may hereafter come to 

 my knowledge tending to weaken the "siews I hold, and 

 which I have been defending simply from a sincere belief 

 in their accordance with truth. 



* This genus I have ealled Gangamopteris, the chief characters being 

 those referred to in ray old paper quoted above, as separating the plants in 

 question from Qlossopiens on the one hand, and from Cydopteris on the 

 other. 



