OF LOWER GREEXSAND PLANTS. 283 



V. 13232 d. Figured, PL XXIX, fig. 2. Transverse section of a 

 larger piece of the same block, very similar to the 

 above. Locally the broad rays and the wood-elements 

 can be well seen. 



V. 13232 e. Figured, PL XXX, fig. 3. Oblique tangential 

 section, in which the rays are cut in various directions 

 and are rather obscure ; in very many places, however, 

 short lengths of the wood-vessels, and also of the rays 

 in contact with them, show their pittings very clearly. 



V. 13232 f. Figured, text-fig. 86. Rather oblique radial longi- 

 tudinal section in which very numerous rays are 

 to be seen, with the pitting frequently well- 

 preserved. Numerous pitted vessels are also to be 

 seen, and these are blocked in most cases by tyloses, 

 the end-walls of which are noticeable in a low-power 

 view of the wood. 



V. 13232 g. Tangential longitudinal section of the wood showing 

 clearly the great height of the multiseriate broad 

 rays. 



v 



Permeating all the above sections, and in particular 

 the cells of the medullary rays, are immense numbers 

 of beautifully petrified fungal hyphas. There are also 

 structures suggestive of fungal fructifications, particu- 

 larly in the tangential view of the medullary rays of 

 the wood. 

 Hythe Beds (Lower Greensarid) ; near Maidstone, Kent. 



Presented Ly the Committee of the 

 Corporation Museum, Maidstone, 1915. 



Genus APTIANA, Stopes. 

 [Phil. Trans. Roy. Soc. Lond., ser. B, vol. 203, p. 84, 1912.] 



As only one species of this genus was known when it was 

 originally described, and as botanists are not yet in a position to 

 determine which features in angiospermic wood-anatomy are of 

 generic and which of specific importance, the species and genus 

 were not separately diagnosed. 



