GENERAL RESULTS 663 



point of view. There is room, even with the material 

 already available, 1 for important work on other lines. 

 The subject of ■ the biology and ecology of fossil 

 plants, as illustrated especially by their physiological 

 anatomy when suitably preserved, offers a wide and 

 promising field of research. Such biological studies 

 will be of the greatest intrinsic interest, and will also 

 throw a new and welcome light on the problems of 

 Evolution. 



1 New sources of material, especially of petrified specimens showing 

 structure, are urgently to be desired. As this book goes to press, I have 

 received from Dr. Kubart of Graz sections from the magnificently pre- 

 served nodules of the Moravian Coal-measures, a field hitherto unworked 

 from a structural point of view. 



