OF LOWER GJIEKNSAM) PLANTS. 



85 



rc. 



rcb. 



red. 



Text-fig. 18. Protopiceoxylon Edwardsi, sp. nov. Transverse view of two 

 small resin-canals. rcb., epithelial cell projecting irregularly into 

 canal, rc. red., symmetrical large cells, not yet fully separated to form 

 canal (cf. rca. in text-fig. 17). IS'o. V. 4859 c. 



Text-fig. 19. Protopiceoxylon Edwardsi, sp. nov. Longitudinal view of the 

 thick-walled epithelial cells of the resiu-canals, showing the pits in 

 the walls. So. V. 4S5'Jy. 



