94 - EXPLANATION OF PLATE 56. 



retains the bark-scales modified by pressure of the 

 Strobilus or cone that grew from the centre of the 

 disk. The upper portion of the Scar is without in- 

 dications of bark-scales, and is covered with radiat- 

 ing furrows, impressed on it by the long slender 

 scales of the base of the Strobilus, which have obli- 

 terated the bark-scales.* 



The character of this scar approaches to that of 

 Fig. 5, but its proportions differ, measuring 3^ inches 

 in the longer, and 2h inches in the shorter diameter. 

 The scaly bark (which in Fig 5 has been almost en- 

 tirely removed from the area of the scar,) is pre- 

 served on the lower portion of the disk of Fig. 6. 

 Scale two-ninths. (Original.) 

 Fig. 6'. Cast of Ulodendron Conybearii (nobis) formed by 

 Pennant sandstone of the Coal formation at Staple- 

 ton near Bristol. This cast expresses the exact form 

 of an oval scar, or cavity on a stem from which a 

 cone had fallen off 



The disk is covered with slight ridges and furrows, 

 radiating in all directions from the point of insertion 

 of the cone, and formed by pressure of its lowest 

 scales upon the portion of the stem to which it was 

 attached. Beneath the point of insertion, a few small 



*The portions above and below the line drawn across Fig. 6, are 

 copied from two scars in Rhode's figure. Rhode considers these 

 impressions to be powers, and the compressed bark-scales to be the 

 Petioles of the flower, and has represented the trunk in an inverted 

 position. • 



As, in every species of Ulodendron which we have seen, the fur- 

 rows produced by scales at the base of the cone, are deepest on the 

 upper portion of the Scar, we infer from this circumstance that the 

 jcones were inclined upwards and inwards, with their axis approxi- 

 mating to that of the stem from which they issued. 



