222 DESCRIPTIVE CATALOGUE 



V. 5460 d. Oblique tangential section of above. The tangential 

 view of the rays can just be seen, hut most of the 

 section shows the radial view of the tissues. 



Lower Greensand ; Woburn Sands. 



Transferred from the Botanical Dept. 



V. 5450. A small specimen of decorticated branch, 13 x l >- "> cm. 

 in diameter and G cm. long. The stem is very similar 

 to the above in preservation. 



V. 5450 a. Transverse section of the same. The section is poor 

 and the preservation of the fossil very faulty. So f;ir 

 as observable, it seems entirely to agree with the above 

 specimen. 

 Lower Greensand ; Woburn Sands. 



Transferred from the Botanical I)<'j>(. 



V. 5455. A small part of a very small brauchlet or twig, too 

 imperfectly preserved for certain determination, but 

 perhaps of this species. The type-specimen is part 

 of a much older axis, so cannot well be compared. 

 This small branch measures 1 cm. in diameter and 

 contains a central pith. After cutting the sections 

 only about half a centimetre of the specimen remains. 

 The wood is decorticated, and externally shows tho 

 woody texture. The tissues are poorly preserved in 

 an almost colourless silicified medium, here and there 

 very small streaks of iron-stain make the details show 

 up a little more clearly. 



V. 5455 a. Transverse section of the above. The pith is 1-5 mm. 

 in diameter, and a few of the large irregular cells are 

 clearly preserved, the majority are much macerated. 

 Primary wood in several bundles round the pith is 

 preserved in a shadowy vague form. A number of 

 regular rings of secondary wood arc faintly preserved, 

 these showing a well-marked differentiation of spring 

 and autumn wood. Resin-containing xylem-paren- 

 chyma is scattered through the wood. Passing out 

 through the secondary wood is a large leaf-trace. 

 This is coloured by a streak of iron-stain and shows 



