OF LOWER GREEXSAND PLANTS. 333 



V. 6127 d. Transverse section similar to the above, in which a 

 larger number of leaf-traces are present, breaking up 

 the /ones of wood. The perimedullury wood-zone is 

 conspicuous and well preserved. 



V. 61276. Figured, PI. XXXI, fig. 1. Transverse section 

 similar to the above, a little broken but locally 

 exceedingly well preserved. 



V. 6127 f. Figured, text-fig. 107. Transverse section similar 

 to the above, in which the alternating wood-rings and 

 leaf-traces are well seen. 



V 



V. 6127 g, h. Parts of the same transverse section, which was 

 broken in mounting and placed on separate slides. 

 All the tissues are well preserved. 



V. 6127 j. Radial longitudinal section showing a large area of 

 the pith. The wood-zones are much fractured and 

 incomplete. 



V. 6127 k. Figured, PI. XXXII, fig. 1 ; text-fig. 109, B. Radial 

 longitudinal section through the pith and wood-zones, 

 and also through an outgoing leaf-trace. The anas- 

 tomosing leaf-strands of the perimedullary wood, arid 

 the alternating zones of secondary wood can be well 

 seen, in particular one /one of horizontally running 

 wood (here cut in transverse section), which shows 

 that it is undisturbed by the massive outgoing leaf- 

 trace. The normal, vertically running wood-zones 

 are cut in radial section and show their tracheid-pitting 

 and medullary ray-cells well preserved. 



V. 6127 1. Tangential longitudinal section showing a consider- 

 able area of the wood well preserved, and parts of 

 eight leaf-traces more or less broken out. The cut 

 ends of the medullary rays and the very erratic course 

 of the tracheids can be well seen. 



V. 6127 m. A smaller tangential longitudinal section similar to 

 the above, showing five well-preserved leaf-traces. In 

 several of these the irregular masses of secondary 

 vascular tissue can be well seen. 



