IM.ATK XIX. 



////<. s]>. nov. Sections oi' wood. 

 Lower Greensand; Woburn Sands, Bedfordshire. 



Fig. 1. Transverse section of the secondary wood, showing the 

 well-marked regular rings and the narrow zone of 

 autumn wood. No. V. 5459 6 (p. 204). 



Fig. 2. Radial section of above. To the left of the photo can be 

 seen three or four rays connected by short irregular 

 tracheids. In each tracheid-field of the ray -cells L? 

 to 4 small pits can be clearly seen in the radial walls. 

 No. V. 5459 e (p. 207). 



Fig. 3. Higher power view of a pair of similar rays. At p. the 

 pits in the ray-cells can be very clearly seen, and in 

 this and the neighbouring cell on the right the border 

 round the pits can be made out. No. V. 

 (P- 207). 



