XLIV] 



CTTPEESSINOXYLON 



193 



Oupressinoxylon cryptomerioides Stopes. 



A species 1 founded on a small branch from the Lower Green- 

 sand of. Kent showing the following features: — the primary 

 xylem, composed of spiral and scalariform elements, also tracheids 



Fig. 717. Oupressinoxylon Hortii. Radial section showing the pits of the medullary 

 rays, mp ; the pits on the tracheids, and the wood-parenchyma, rp. (After Stopes. ) 



with small circular pits, forms projecting wedges in the perimedul- 

 lary region ; there are no resin-canals and resiniferous parenchyma 

 is abundant; the medullary rays, generally 2 — 3 cells in depth, 

 have two circular pits in the field, a feature regarded by Kraus as 

 indicative of affinity to Glyptostrobus^. The cortex contains large 



» Stopes (15) p. 186, Pis. xvi., xvii., text-figs. 54, 55. 

 2 See page 198. 



s. IV 



13 



