DESCRIPTIVE CATALOGUE 



25 cm. long by 12 cm. in diameter. As is shown in 

 the figures, the upper part is covered by the closely 

 arranged leaf-bases, which are broken off the lower 

 half so as to show the rough surface of the cortex. 

 On the right side of the specimen this again splits 

 off, exposing the outer surface of the outer wood-ring, 

 in which the elongated scars of the leaf-traces are 

 visible. On the other side of the specimen the large 

 pith, 8 cm. in diameter, is represented by roughly 

 granular matrix. On either side of this the axis is 

 split in nearly median radial section, and shows the 

 two wood-rings and the tisane between them very 

 clearly (text-fig. 95, B). The broken end of the section 

 also shows these wood-rings well weathered out (text- 

 h'g. 95, A). The leaf-bases at this end show clearly 

 their upturned tumid bosses. This specimen, like all 

 the others, is preserved in dark heavy limonite. 

 " Potton Sands," Lower Greensand ; near Leigh ton 

 Hu//ard. BIJ <*.trJt(fnf/(\ Itoval Agricultural Collei/e, 



Cirencester, 1915. 



V. 5217, V. 5219, V. 9384. Figured, text-fig. 100. Are all 

 probably part of a single specimen. 



V. 5217. A block very similar to the upper end of the type- 

 specimen, measuring 14 cm. long by 9 cm. across, 

 this width not being the complete diameter of the 

 stem. Pith-casts, wood-zones, and leaf-bases can all 

 be well seen. One end of the specimen is cut across, 

 and the smooth surface shows very clearly to the 

 naked eye the pseudo-concretionary nature of the 

 mineral matrix, which gives a false appearance of 

 medullary vascular strands, probably the cause of 

 Carruthers's statement that there are vascular bundles 

 in the pith. 



V. 5217 a. Transverse section from the cut surface described 

 above. The tissues are almost entirely obliterated by 

 the opacity of the mineralising medium, and are much 

 broken. {Some rows of trachcids in the woody zone 



can be detected. 



