CLATHRARIA LYELLII. 159 
These fossils present, both externally and internally, a 
_ close relation to the bulbiform stems of the recent Cycadez, 
named Encephalartos, of South Africa.* 
Neither the leaves nor the fruit are 
known: a cone found in the Dirt-bed 
of Portland, and attributed to these 
plants, appears to belong to the coni- 
_ ferz of the petrified forest. Examples 
_ of Mantellize have been found in the 
4 quarry of Portland-stone at Swindon, 
— Wilts. 
| CuaTHrariat Lyeviu. Lign. 52— 
_ 57.—The fossil plants to which I 
would next direct attention were first 
_ discovered by me in the Wealden strata 
_ of Sussex, in 1820, and were figured and 
described under the name they still 
bear, in my Fossils of Tilgate Forest, in 
1827. The specimens figured in that 
work are the most illustrative hitherto 
discovered, with but one exception.+ 
From the imperfect state of the 
remains of these plants, the structure 
and affinities of the originals were very Lien. 52. 
ambiguous, and the fossils have been CuaTuraxra Lyexxii. 
placed by some eminent botanists with , Ri anit eae 
the Liliaceze, and by others with the inner axis: the original 3} 
Asphodeleze ; their true botanical posi- “*t "8". 
tion is doubtless with the Cycadacee ; for in some points 
they resemble the Zamiz, in others the Cycadece. 
> 
* The fossil Cycads of the Isle of Portland are admirably described 
and illustrated in Dr. Buckland’s Bridgewater Essay, (p. 497, and 
pl. Ix. lxi.), and their internal structure is fully explained. 
+ Clathraria, i.e. lattice stem, from the scars left by the petioles. 
+ They are now in the British Museum; see Petrifactions, p. 45. 
Room I. Case E. 
