98 CATALOGUE OP FOSSIL PLANTS 



that the stem belongs to Lepidodendron and not to Sigillaria. 

 It is probable that many of the upright stems observed in col- 

 liery workings and quarries, and referred to Sigillaria, belong 

 to Lepidodendron. The height of Lepidodendron has been esti- 

 mated at a hundred feet, but judging from the length of com- 

 pressed stems seen on the shale which covers the coal in Hebburn 

 Colliery, between thirty and fifty feet is the approximate height 

 of this species in this Coal-field. 



For remarks on Stigmaria, see further on. 



Lepidodendron Anglicum, Presl. 



Type — Lepidodendron Anglicum, Sternb.,Yers. I.,pl. 29, 



f. 3. 

 Aspidiaria Anglicum, Sternb., Yers. II., pi. 29. 

 Lepidodendron ,, Presl, Yers. II., pi. 68, f. 11. 



187. — Lepidodendron Anglicum, Sternb. 



Small slab of shale with impressions of subrhomboidal leaf- 

 scars. The scars are separated by a sharp ridge, and touch 

 each other near the broadest part ; they are acuminate at both 

 ends, and near the upper end there is a raised ridge across a 

 tetragonal depression near the centre of each scar, below 

 which is a deepish groove with obscure raised elevations be- 

 neath the tetragonal markings. This is probably Sternberg's 

 L Anglicum. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 338). 



Remarks. — The specimen which I have referred to Sternberg's 

 L. Anglicum, consists of a slab with impressions of rhombic- 

 shaped leaf- cushions and -scars of part of an old stem of Lepido- 

 dendron. I am quite aware that Mr. Kidston has recently, 

 Trans. Boy. Soc. Edinb., Yol. 32, referred some specimens of 

 Phytolithus verrucosus, Martin, to Sternberg's species quoted 

 above under the name of Stigmaria anglica. I shall not discuss 

 here whether the plant he has so referred is a Stigmaria or not, 

 but the specimen catalogued above is most certainly part of the 

 stem of a Lepidodendron, and it approaches most closely to Stern- 

 berg's figure, which at present I consider represents part of 

 the stem of a Lepidodendron. In making this comparison I 



