OF LOWER GREEN SAXD PLANTS. 



213 



species; for, though the liner details of its structure are not 

 seen, it agrees with the other specimens so far as it is preserved. 

 Other more or less well-preserved portions of wood are also 

 included in the species. 



Text-fig. 61. Podocarpoxylon woburnense, ep. nov. Radial section showing 

 medullary ray-cells with single large pits in each tracheid-field, mp. ; 

 resin-containing element in ray, mr. ; and resin-parenchyma, rp. 

 pp., tracheid with bordered pits in pairs. No. V. 5456 c. 



TOPOGRAPHY OF THE STEM. Secondary wood alone is present 

 in the type-specimen. In this the growth-rings are sharply 

 differentiated (PI. XX, fig. 1), and consist of from 12 to 66 



