130 BTJCKLANBIA. 



Cycadeomyelon (Bucklandia), sp. 



V. 2332. Probably a portion of a pith cast; but the larger 

 medullary ray impressions suggest some other stem than that 

 with which the ordinary Clathraria Lyelli is occasionally found. 



V. 2804. Considerably flattened sandstone cast. The form, of 

 the medullary ray impression and of the leaf-trace bundle is more 

 distinctly shown than in most specimens. Schenk's figure also 

 shows this feature clearly. The form of the medullary ray casts 

 in Weiss' genus Tylodendron is very similar to that of the cor- 

 responding structures in the present specimen. Good figures of 

 Tylodendron will be found in a paper on that genus by Potonie. 1 

 Cf. also similar casts in Voltzia. 



V. 2804rt. Similar specimen, but less flattened. Part of a scale 

 at one end of the cast. Ecclesbourne. Rufford Coll. 



8268, 12333. Portions of pith casts; probably of the lower 

 portion of the stem axis. Tilgate Forest. 



8264. Figured by Mantell, Illust. Geol. Sussex, pi. i. : 93cm. 

 in length; at broadest part the diameter is 13cm. The details 

 of surface characters not very clearly preserved. Tilgate Forest. 



Mantell Coll. 



8269. 79 cm. long, diameter 13 cm. A large branched specimen, 

 showing at the summit an apparently dichotomous bifurcation. In 

 addition to the large branches, there are the scars of six or seven 

 smaller lateral branches, about 2 cm. in length ; the smaller 

 scars are all on one side of the specimen and arranged in a 

 fairly regular line. Cf. Gb'ppert's figure of Cycas reuoluta with 

 the numerous large and small branches. 2 Tilgate Forest. 



Mantell Coll. 



8274. 78cm. long, 7-5 cm. in diameter. The breadth varies, 

 but there is no regular alternation of narrower and thicker 

 portions. Tilgate Forest. Mantell Coll. 



1 Potorue (2). 



2 Goppert (3), pi. ix. fig. 3. 



