PLATE XXIV. 



Vectia luccombensis, gen. et sp. nov. Radial longitudinal section, 

 showing the pitted vessels and fibres crossed by medullary 

 rays. Lower Greensand ; Luccomb Chine, Isle of Wight. 



i' 1 , v 2 , the pairs of vessels, p. the rows of pits in their radial 

 walls ; s., the fibres with narrow lumen, Z. ; a., narrow 

 parenchyma-cells lying in places between the pairs of 

 vessels ; m. y medullary ray-cells ; n., short narrow 

 elements of the cork-like layer. No. V. 13230 I 

 (p. 252). 



