194 DESCRIPTIVE CATALOGUE 



V. 13200 b&C. Two thinner transverse sections similar to 

 above. 



V. 13200 d & e. Median radial sections through the pith. All 

 the tissues preserved in these diaphanous sections 

 agree with the type, so far as they can be seen. 



V. 13200 f. Oblique longitudinal section, showing a few medul- 

 lary rays in radial and a few in tangential section. 

 The latter are low, only 2-^ cells high, as in the type. 



V. 13200 g. A radial section in which most of the tissue is ill- 

 preserved. In one place a leaf-trace making its exit 

 through a medullary ray can be well seen, because it 

 is locally stained with iron. 



Kentish Rag ; Iguanodon Quarry, near Maidstone. 



Presented by the Maid stone Museum. I'.'ll?. 



Cupressinoxylon Hortii, sp. nov. 

 [Plate XVIII ; text-figs. 5(3, 57, 58.] 



Diac/nosis. Secondary wood composed of large squarish 

 tracheids up to 60 //. in diameter. Hound bordered pits chiefly 

 in one row, separated some distance from each other, a few 

 almost adjacent or touching. Tangential pits in autumn wood. 

 The vertical course of the tracheids is very wavy to fit round the 

 medullary rays. Annual rings clearly marked, but very small 

 amounts of thickened elements. Medullary ravs uniseriate to 



* V 



multiseriate, the same ray varying at different heights. Kays 

 exceedingly numerous, often only 1 tracheid distant, and very 

 high, running up to 80 cells in vertical series. Walls of ray- 

 cells smooth ; pits in radial walls chiefly 1, may be 2, per tracheid- 

 field, large, oval or circular. Resin-parenchyma abundant, 

 scattered all through the wood ; cells very large, with a dis- 

 tended appearance in vertical sections, and considerably con- 

 stricted by their horizontal walls. 



Species founded on large woody trunks, secondary wood only 

 known. 



HORIZON. Fuller's Earth in Lower Greensand. 



LOCALITY. Woburn Sands. 



TYPE. Large woody trunk, no. V. 11847 and slides 



