BUCKLANDIA. 127 



characteristic ridges of Clathraria. The petiole scars have 

 rounded or truncate lateral angles, but those towards the lower 

 part of the specimen have their lateral angles more acute ; this 

 is indicated in Carruthers' figure on the left of the pith cast. 

 Probably specifically identical with specimen V. 3309, figured 

 by Carruthers as Bucklandia Mantelli. Tilgate Forest. 



8358. Figured by Stokes and "Webb, loc. cit. pi. xlv. fig. 2. 

 Mantell, loc. cit. pi. ii. fig. 2. 



The figure of this specimen does not do full justice to the 

 details shown on the stem surface. If some of the scars be 

 compared with the lower petiole bases of V. 3308 it will be found 

 to be a matter of some difficulty, not to say impossible, to point 

 to any distinct difference between the two forms, the former of 

 which Carruthers speaks of as Bucklandia Mantelli, and the latter 

 as B. anomala. 



A second smaller specimen in the form of a slightly com- 

 pressed hollow cast of the bark with weathered petiole bases, and 

 on the upper portion bearing scars of scale leaves. Very similar 

 to Mantell's pi. iii. fig. 4. As shown in Mantell's figure, there 

 is a distinct projecting ridge above the petiole scar, and separated 

 by a depression from the main part of the petiole ; this is pro- 

 bably due to the irregular or unequal weathering of scleren- 

 chymatous and parenchymatous tissue. Cf. a stem of Cycas. 

 Tilgate. 



V. 3308. Figured by Mantell, Geol. S.E. England, pi. i. fig. 2, 

 and by the same author in Illust. Geol. Sussex, pi. i. fig. 2. 



Here again the figures do not do justice to the specimen. In 

 this stem the petiole scars are clearly preserved and larger than 

 in the other examples of the same species ; they are not so much 

 obscured, as in many specimens, by the irregular surface ridge 

 and projections which Carruthers regards as the remains of a 

 gummy exudation on the original plant stem. Some of the more 

 prominent scales resemble the form which occurs in close associa- 

 tion with V. 2749, and the lower portions of some of the larger 

 scales suggest a reticulate marking like that in V. 2749 and in 

 several of the isolated scales. The lateral angles of the scars are 

 for the most part rounded or obtuse, but in some the angles 



