OF LOWER GBEEXSAXD PLANTS. 



269 



be seen in text-figs. 79, 80, the huge vessels and the medullary 

 rays are obvious, but the finer details of the elements are not 

 properly preserved. 



Text-fig. 80. Wobnrnia porosa, Slopes. Transverse section of small part, 

 of the wood showing the large vessels, c. ; the broad medullary 

 rajs, d. ; a., wood-fibre ; f/., wood-parenchyma. After Stopes. 



Note that this is magnified 100 diameters, and is exactly the same 

 magnification as text-fig. 80. with which it should be contrasted. 



