534 



pits in the field in connection with the rays. These pits have 

 narrow oblique slits (lig. 4). 



Spiral bands appear on the tracheids, but no rims of 

 Sanio were observed. 



Apparently there is no xyltni parenchyma. 



Mesembrioxylon, 



sp. 



Yallourn B (figs. 5, 6). 

 Gr()}ith rings are well defined in this wood. No tracheids 

 or xylem parenchyma with dark-brown contents were found. 



Fig. 8. 



Cupressinoxylon, sp. 



Yallourn. Tarngential 



section showing 



medullary ravs. 



x55. 





7 



® 



® ® 



Fig. 9. 



Cupressinoxylon, sp. Yallourn. 



Kadial section showing pits in the 



field and pitting on the tracheids. 



x27o. 



The average diameter of the tracheids is 30/y.. 



Bordered pits are circular, separate, and scattered,, 

 usually in one row. Occasionally the pits are slightly 

 flattened (fig. 5). 



McdnUary rays are uniseriate, from one to eight cells 

 high, occasionally more than eight cells (fig. 6). The ray 

 cells are large and thick-walled. The pitting in con- 

 nection with the medullary rays is well preserved, there being 

 one large oblique pit in the field (fig. 5). Occasionally the 

 pit may have the appearance of a border. 



