OF LOWER GREENSAND PLANTS. 



249 



specimen part of a large axis. The outer zones of the tissue 

 were frayed and broken up before petrifaction, but there was 

 no limiting layer to either face. 



In the specimen now in the Museum, from which the sections 

 were cut, the transverse diameter is about 20x35 mm. In the 

 second specimen in my collection, it is as much as 26x37 mm., 

 and both show regularly running and nearly straight /ones 

 which have every appearance to the naked eye of being ordinary 

 and rather uniform annual rings (text-fig. 72). 



The frayed edge of the specimen in the British Museum is 

 penetrated by the granular matrix and glauconite grains, and 



n- 



Text-fig. 73. fec/ia f-uceombcHs-t*. sp. nov. Transverse seel ion of a small 

 area showing the regular alternation of the fibres, s.\ s.' 2 with the 

 radial pairs of pitted elements, t'. 1 and v.~ ; m., medullary ray-cells, 

 with straight end-walls; a., small parenchyma-cell in the angle 

 between four thin-walled elements ; sp., pits between adjacent 

 fibres ; 1., much reduced lumen of fibre. 



also by minute fragments of disintegrated plant-debris, among 

 which is a seed, unfortunately too much broken for determina- 

 tion, and also the little twig of Sequoia giyauteoides, sp. nov. 

 (see p. 70). 



TOPOGRAPHY OF THE TISSUES. No pith or cortex is present. 

 The tissues consist entirely of very definitely alternating zones 



