OF LOWER GREENS A>*D PLANTS. 



303 



B Ntfy 



Text-fig. $v. Cycadeoidea, Yatesii, Carr. Drawing of a small portion of 

 the broken end of the stem, A in transverse, E in radial longitudinal 

 direction. /., leaf-bases ; ph., phloem ? ; ^ and * 2 , separate concentric 

 rings composed of radial series of secondary tracheids; p., pith. 



Text- fig. S&. Cycademdea Yatesii, Carr. Details of a few tracheids from 

 one of the wood-rings, m., medullary rays, of which no cells remain ; 

 #., rows of secondary tracheids. !Xo. V. 5210 a. 



