t - 



204 



ON CUTICLES OF CTGADEAN KiONDS. 



Fig. 5. Taniopteris vittata. Part o£ upper epidermis, showing characteristic folded cell-walls. From 



Fig. 6 



Fig. 7 



Gristhorpe. x 200. ' 

 Taniopteris vittata. Part of lower epidermis, showing stomata which were slightly sunken, and 



hence the walls of the epidermal cells are out of focus. X 200. 



nictyozamites Haioelli. Lower epidermis, showing stomata. The characteristic form of the 



upper thickening lamellae is seen in a few cases. 



Marske 



X 180. 



Fig. 8. Anomozamites Nilssoni. Lower epidermis with stomata. From Gristhorpe. x 200. 



Fig. 9. Nilssonia sp. From Roseberry Topping. Upper epidermis, showing characteristic papilla. 



X 180. 

 Fig. 10. Nilssonia mediana. Lower epidermis, showing elongated cells with papillse occurring below 



the veins, while the cells of the intermediate areas are rounded. From Marske. X 200. 

 Fig. 11. Nilssonia orientalis. Portion of upper epidermis from specimen No. 323 in the Natur- 



historiska Riksmuseura, Stockholm. Found e 

 has been figured as Nilssoniopteris tenuinervis. 



Wyke. X 200. This specimen 



Fi". 12. Ptilozamites Leckenhyi. Part of lower epidermis, showing straight -walled cells and stomata. 



From Gristhorpe. X 200. 

 Fig. 13. Ctenis falcata. Part of lower epidermis with stomata. From Gristhorpe. x 200. 



