OF LOWER GRKEXSAND PLANTS. 199 



The isolated, round, bordered pits in the tracheids are those 

 of a typical Abietinean Conifer, arid there is no abnormal 

 character in the wood except the broad rays and consequent 

 loose texture of the wood and the rather erratic course of the 

 large tracheids. The plant was evidently a tree of some con- 

 siderable girth, and consequently of fair height. Of the Cupres- 

 sinean woods now described it is least like any modern type, and 

 the discovery of its fructifications would be of great interest. 



V. 11847 [V. 11848 & V. 11849 probably part of the same 

 trunk]. Type-specimen. Part of a large trunk con- 

 sisting only of an irregularly broken-out mass of 

 secondary wood, 12x9x8 cm. The specimen is 

 almost free from matrix, and shows the woody texture 

 very clearly ; one exterior face is much teredo-bored, 

 and the texture of the wood is eaten out in high 

 relief in a white friable form. Internally the petri- 

 fying medium is very hard and close-grained, and 

 locally preserves the wood extremely well. It is of a 

 rich cream-colour, much iron-stained in patches. 



V. 11847 a. Figured, PI. XVIII, fig. 1. Transverse section of 

 part of the secondary wood. In this the wide annual 

 rings can be well seen, also the large square tracheids 

 and the broad multiseriate medullary rays. 



V. 11847 b. Figured, text-fig. 56. Longitudinal radial section 

 of the above. The large and constricted resin-paren- 

 chyma cells are very conspicuous in this. Locally, 

 where the iron-stain shows up the detail, the pitting 

 of the tracheids and the radial walls of the medullary 

 ray-cells can be well seen. 



V. 11847 C. Figured, PI. XVIII, fig. 2 ; and text-fig. 57. Longi- 

 tudinal tangential section of the same. In this, as 

 illustrated in PI. XVIII, the enormous mass of the 

 medullary rays is very conspicuous. The rays, cut in 

 tangential section, are exceedingly high in many cases, 

 and are uniseriate, biseriate, and multiseriate in 

 different parts of their height in the same section, and 

 they sometimes bifurcate so as to fit in between the 



