OF LOWER GREEKSAX1) PLA3TTS. 



197 



series of single, large, roundish pits in the radial walls of the 

 rays, one for each tracheid-width (text-fig. 56, mp.). 



AFFINITIES. The extraordinary broad, high, and irregular 

 medullary rays find no parallel, so far as I am aware, in any 

 Conifer, either living or fossil. It is true that a tangential 



Text-fig. W. Ctiprestinoxylon Hortii, sp. nov. Radial section, showing 

 pitting of tracheids and medullary ray. mp., pits of medullary ray- 

 cells ; rp., resin-containing wood-parenchyma. No. V. 118476. 



section which almost cuts the pith in all Conifers will show 

 multiseriate rays, but this is only just at the centre of the stem 

 where the broad primary rays are fusing with the pith. In the 

 secondary wood, even in the second year, rays of this sort do 



