356 



ERNEST WAKREN. 



III. SYSTEMATIC POSITION. 



With regard to the systematic position of these fossil woods, 

 there would appear to be nothing to prevent the first series 

 being referred to the species Da doxy Ion australe Arher. 

 The second species, with single pores between medullary cells 

 and tracheides, recalls in this character Araucarioxylon 

 la tip or o sum Kraus from the Jura of Spitzbergen, but in 

 the former the medullary cells extend across two to three 

 tracheides, while in the figure of the latter given by Schenk^' 

 they only extend across one. 



lY. CHEMICAL COMPOSITION AND PHYSICAL 

 PEOPEETIES. 



In order to ascertain the nature of the mineral substances 

 replacing the substance of the woody tissues and more or less 



' Zittel, Karl A., " Handbucli der Palseontologie.' II, " Palseophy- 

 tologie," p. 868. 1890. 



