PLATE V. 



Fig. 1. Pityoxylon Sewardi, sp. nov. Tangential section 

 showing the numerous uniseriate medullary rays. 

 Lower Greensand ; Ighthara, Kent. r.c., resin-canal 

 in multiseriate ray; tr. t ray-tracheids alternating with 

 contents-containing parenchyma, c. No. V. 1440 c 

 (p. 95). 



Tig. 2. Pityoxylon Benstedi, sp. nov. Radial section showing 

 numerous medullary rays. Kentish Hag ; near Maid- 

 stone, Kent. r.tf., ray-tracheids ; r.c., resin-canal, 

 with, e., its thick-walled epithelium. Cf. text-fig. 26. 

 No. 38353 B/ (p. 105), 



