xxxvin] 



BXJCKLANDIA 



485 



covered with rhomboidal leaf-bases separated from one another 

 by a ramental reticulum. There are two concentric vascular 

 cylinders as stated by Carruthers. In a recent account of this 

 species Dr Stopes^ adds further details: the xylem-cylinders are 



Tig. 577. Bucklandia Yatesii. Type-specimen in the British Museum. 



5 — 8 mm. wide and the tracheids occur in single rows or there 

 may be bands 4 — 5 elements broad; the circular bordered pits 

 are uniseriate or in two alternate series. The medullary rays 



1 Stopes (15) p. 299, text-figs. 93—97. 



