124 BTJCKLANDIA. 



1850. Clathraria Lyelli, linger, Gen. spec, plant, foss. p. 314. 



1851. Clathraria Lyelli, Ettingshausen, Abh. k.-k. geol. Reichs. vol. i. Abth. 



iii. No. 2, p. 25. 



1851-52. Clathraria Lyelli, Bronn, Leth. geog. vol. ii. p. 63, pi. xxviii. fig. 7. 

 1854. Clathraria Lyelli, Morris, Brit. Foss. p. 6. 

 1870. Bucklandia anomala, Carruthers, Trans. Linn. Soc. vol. xxvi. p. 686, 



pi. liv. figs. 1-3. 

 Sucldandia Manlelli, Carruthers, ibid. p. 686, pi. liv. fig. iv. 



1870. Clathraria Lyelli, Schimper, Trait, pal. veg. vol. ii. p. 182. 



1871. Clathraria Lyelli, Schenk, Palaeontographiea, vol. xix. p. 227, pi. xxx. 



fig. 7. 



1874. Clathraria Lyelli, Schimper, Trait, pal. veg. vol. iii. p. 553. 

 Clathraria Mantelli, Schimper, ibid. p. 553. 



1875. Clathraria Lyelli, Topley, Weald, p. 409. 



1889. Clathraria Lyelli, Bristow, Geol. I. Wight, p. 258. 



Type. Pith casts and structureless casts of the cortical surface 

 of stems. British Museum. 



In 1822 Mantell gave a brief description of some fossil stems 

 from Tilgate Forest for which he proposed no name, but suggested 

 that they might be allied to the Euphorbiaeece, or possibly to certain 

 arborescent ferns. Two years later Stokes and Webb proposed 

 to include these fossils in the genus Clathraria, and gave them 

 the name of C. anomala ; the surface-markings suggested to them 

 a resemblance to the recent Zamia and Cycas. In the Geology 

 of the South-East of England Mantell claims priority for his 

 name of Clathraria Lyelli ; he notes the occurrence of imperfect 

 leaf fragments in association with the stems, and speaks of them 

 as linear-lanceolate in shape. Having mentioned such plants as 

 he considers most closely allied to the Tilgate fossils, Mantell 

 adds : " the impressions of the petioles on the bark bear a great 

 resemblance to those on the stems of Cycas revoluta and 

 C. circinalis." In a later work l the same writer speaks of the 

 axis, roots, leaves, and probably fruit of Clathraria as having been 

 discovered in close association or connection with one another. 

 He gives a woodcut showing some of the long linear-lanceolate 

 leaves attached to the stem, and remarks that impressions of such 

 yucca-like leaves have often come under his notice. It is 

 unfortunate that none of the specimens of Clathraria afford any 

 evidence whatever as to the form of the leaves as described by 



1 Mantell, Medals, vol. i. p. 182. 



