PLATE XX V r . 



Vectia luccoinbensis, gen. et sp. nov. Sections of part of tissues. 

 Lower Greensand ; Luccomb Chine, Isle of Wight. 



Pig. 1. Transverse section showing the arrangement of the 

 tissues. *., fibres ; v\ v 3 , pair of thinner elements 

 (sieve-tubes); m., medullary ray, in which the end- 

 walls of the cells can be seen (p. 249). 



Fig. 2. Tangential section showing the uniseriate medullary 

 rays. #., ray composed of small cells; ?/., ray com- 

 posed of large cells. No. V. 1&&0 c (p. 250). 



