OF LOWEll GREENSAND PLANTS. 



fC. 



Text-fig. Yl.Protopiceoxylon Edwardsi, sp. nov. Transverse section of 

 part of tbe secondary wood, re., resin-canal ; rca., very small canal 

 with four symmetrically placed epithelium-cells; mu>., wall of medullary 

 ray-cell with abietinean thickening and pitting. No. V. 48f>9 c. 



