186 . DESCRIPTIVE CATALOGUE 



extent resemble our fossil, but they are generally too imperfectly 

 petrified or figured to make detailed comparison profitable. 



V. 13195. Type-specimen. A short straight length of the 

 petrified woody branch from which the sections have 

 been cut. The specimen is 3*5 cm. in diameter and 

 4'5 cm. long. The cut end shows the central axis and 

 regular rings of secondary wood. 



V. 13195 a. Figured, text-fig. 51. Transverse section of the 

 above, in which the pith-cells, primary xylem, and 

 secondary wood can all be well seen. On one side of 

 the axis a branch is beginning to go out. The resin- 

 containing wood-parenchyma and the medullary ray- 

 cells are well preserved in this section. 



V. 13195 b. Itadial longitudinal section of the above. In this 

 the pitting of the tracheids, the cross-walls of the 

 xylem-parenchyma, and the radial pitting of the 

 medullary ray-cells can all be well seen. 



V. 13195 C. Figured, text-fig. 53. Tangential longitudinal 

 section of the above. The details of the numerous 

 low rays and the cross- walls of the xylem-parenchyin;i 

 can be well seen. 



Lower Greensand ; Luccomb Chine, Isle of Wight. 



Found and presented by Dr. M. C. Slopes, lull'. 



Cupressinoxylon cryptomerioides, sj>. nov. 

 [Plates X\ 7 I, XVII; text-figs. 54, 55.] 



Diagnosis. Coniferous wood without resin-canals, though 

 large canals are present in the cortex. Pith about 1 mm. in 

 diameter. Primary bundles numerous, entirely centrifugal. 

 Secondary wood close-grained, composed of regular small 

 tracheids, up to about 25 ju in diameter. Bordered pits round, 

 isolated in a single row. Tangential pits in autumn wood. 

 Annual rings present, but not very strongly differentiated. 

 Medullary rays uniseriatc, mostly 2-8 tracheids distant, low ; 

 cells ail alike, walls apparently smooth, but irregular in shape ; 

 pits in radial walls 2 per tracheid -field, rather large, nearly 



