oK LOWER GREENLAND PLANTS. 293 



V. 11517. The original block, now in five pieces, from which 

 sections have been cut. The specimen is dark in 

 colour, and partly embedded in the coarse granular 

 matrix. One end is weathered and shows the broad 

 rays and wood-texture. The diameter of the wood 

 alone is about 3 f o-3'8 cm. ; in addition there are 

 1*5 mm. of phloem and cortex on the side which is 

 embedded in the matrix. In the cufc face, the broad 

 medullary rays form a striking feature obvious to the 

 naked eye. 



V 1151 7 a. Transverse section of the above, from which the 

 phloem has been ground off in the cutting. All the 

 described features of the wood can be observed in 

 the well-preserved tissues. 



V. 11517 c. Figured, Stopes, Phil. Trans. Roy. Soc. Lond., 

 ser. B, vol. 203, 1912, pi. vi, figs. 8 & 4; pi. vii, 

 fig. 6; pi. viii, fig, 10: also text-figs. 87, 89, 90, 

 ante. Transverse section similar to the above, but 

 showing the phloem preserved in the granular matrix. 

 The section has unfortunately begun to split and float 

 about within the balsam, but large areas of it still 

 show the exquisitely petrified details of the elements. 

 The bordered pits of the fibre-tracheids and the 

 medullary rays are particularly fine. On the upper 

 end of the section the cambium-layer between the 

 xylem and phloem is preserved unbroken, 



V. 11517 d, Figured, Stopes, Phil. Trans. Roy. fcoc. Lond., 

 ser. B, vol. 203, 1912, pi, vi, fig. 1 : also text- 

 fig. 88, ante. Transverse section very similar to the 

 above. The funnel-shaped expansions of t he medullary 

 rays and stone-cell groups in the phloem are shown,, 

 particularly clearly at the right-hand bottom corner 

 of the slide, 



V. 11517 b. Figured, Stopes, Phil. Trans. Roy. Soc. Lond., 

 ser. B, vol. 203, 1912, pi. viii, fig. 11, text-fig. 3: 

 also text-fig. 91, ante. Radial longitudinal section 

 showing very well the details of the broad rays, with 



