352 



DESCBIPTIVE CATALOGUE 



own diameter, or near together, but seldom adjacent or flattened 

 (PI. XII, fig. 2). The remains of " Sanio's rims " are often 

 apparent for example, at s. in PL XII, fig. 2. 



Wood-parenchyma appears to be absent, for I have not been 

 able to detect any in the sections. 



Apart from a few scattered and unspecialised tracheids with 

 blackened contents, there appear to be no special resin-cells. 

 are entirely absent. 



Text-fig. 43. Cedroxylon maidstonense, sp. HOY. Radial section showing 

 the character of the medullary ray-cells, and their groups of many 

 small pits per tracheid-fiekl. pt., rounded, apparently simple pits ; 

 b., doubtfully bordered pits. Owing to the preservation, the pitting 

 of the end-walls is not shown in this view (cf. text-fig. 41, p-t.). 

 No. 17G9c. 



Medullary rays in transverse section correspond to from 2 to 

 G tracheids in radial sequence, and are about 20 ^ in tangential 



