178 DESCltlPTIVE CATAUMilL 



main axis the pith is fairly well preserved, and round 

 it are the remains of a good deal of the primary wood, 

 though it is partly broken away. The rings of 

 secondary wood round the centre of the main axis 

 show the "composite" zones of autumn wood and 

 other features characteristic of the species. Hound 

 the outgoing branch the wood-rings get very wide and 

 irregular. 



V. 13192 b. Longitudinal radial section of the above, partly 

 oblique, so as to show a tangential view of th<- rays. 

 Jn the section the end-walls of the win-containing 



xylem-parenohyma are well seen. The lateral pits on 

 the medullary ray-cells can be made out, but arc 

 lather obscure. 



V. 13192 C. Longitudinal tangmtial section of the above, in 

 which the low medullary rays and the slightly sloping 

 end-walls of the xylem-parenehyma can be well seen. 



Lower Grecnsand ; Luccomb Chine, Isle of Wight. 



Found and presented ly Dr. M. C. fitvpes, 1912. 



V. 8269, V. 8270, V. 8271 (S. 2936, 37, 38). Three sections 

 apparently cut from the same specimen. The slides 

 only, without any history, are available. V. 827<> is 

 a transverse section showing several rings of growth 

 of secondary wood ; some of these are typical 

 ''composite" rings. V. 8200 is a longitudinal tan- 

 gential and V. 8271 a longitudinal radial section, 

 which show most of the characteristic features of 

 C. vectense as described above. Lower Greensaiid ; 

 Shanklin, Isle of Wight. 



Transferred from Botanical Dept. 



V. 8255 (S. 2932). Transverse section of several rings of growth 

 of secondary wood, partly embedded in coarse granular 

 matrix. The section is typical of the species, but as 

 there are no other sections of the specimen, the 

 determination is uncertain. Lower Greensand; Shank- 

 lin, Isle of Wight. Transferred from Botanical Dept. 



