114 DESCRIPTIVE CATALOGUE 



the irregular ray-tracheids, lie elongated and some- 

 what irregular short tracheids with small round 

 bordered pits. 



38353 B g. Radial section ; as in all preparations of this speci- 

 men the pitting of the various tissue-walls is well 

 preserved. 



38353 B h. Median longitudinal section through the pith and a 

 small part of the wood. The pith-cells are well 

 preserved, aud the exit of the primary rays, which 

 have their walls immensely thickened and covered 

 with " abietiuean pitting," is particularly distinct. 



38353 B k & j. Two further median sections showing the pi tt ings 

 of the tissues. Longitudinally running resin-canals 

 filled with tyloses can also be seen. 



38353 Bl. A thick transverse section showing pith and the 

 irregular growth-rings. 



38353 Am. Transverse section showing half the pith and some 

 rings of secondary wood. A very slight obliquity 

 blurrs the primary bundles, but the secondary wood 

 and the resin-canals show well. 



38353 An. A section similar to the above, but showing better 

 some of the primary bundles. The small resan-canals, 

 one iu each primary bundle, can be well seen. 



38353 A 0. Median radial section passing through the pith. The 

 pitting of the rays, etc., can be well seen. 



38353 A p. Rather oblique radial section, running into tan- 

 gential at one side where a branch is given off. 



38353 A q.. Tangential longitudinal section, partly oblique and 

 blurred, but locally showing the tangential view of the 

 medullary rays. 



All from the Kentish Rag, Lower Greensand ; near Maidstone. 



Presented ly W.IL Seated, Esq , 1858. 



