64 D. G. Litlie—Fossil Flora, Bristol Coal-field. 
cannot be identified specifically. The nearest species appears to be 
Lepidodendron Glincanum, Kichwald, especially the figure on pl. v (a), 
fig.:5 of that author’s Lethea Rossica.. Also another specimen attri- 
buted to this species by Dr. Kidston (pl. v, figs. 41-3),? bears 
a marked resemblance to this fossil. We may, however, first discuss 
some other species with which comparison may be made. The first 
of these is Lepidodendron rimosum, Sternberg, to which Zalessky * 
attributes Dr. Kidston’s figures above mentioned. In the true 
L.rimosum the leaf-bases are much larger, more widely separated 
by striated bark, while in older stems of the same plant the separation 
of leaf-bases is even more marked. The leaf-bases in our specimens 
are much narrower, and more elongate in proportion to their length, 
than’ those of Z. rimosum. Further, the decorticated ‘condition of 
LI. rimosum does not correspond to our specimens. 
Another near species is ZLepidodendron dichotomum (Sternberg ?), 
Zeiller, which, however, we believe to be distinct. Zalessky* has 
pointed out, and we understand that Dr. Kidston agrees, that certain 
of the specimens figured by the latter under the name of Z. Glincanum? 
should now be referred to Z. dichotomum. To return to L. Glincanum, 
our specimen is identical with Eichwald’s® pl. v (a), fig. 5, and 
‘also-to ‘a less extent with figs. 1, 2 2, and 3; figs. 1 and 5 show the 
two stages of decortication, just as in our specimens. The specimens 
attributed by Schmalhausen to the same species—especially of those 
recently refigured by Zalessky ‘—correspond to our more external 
surface very fairly, though the leaf-bases are rather larger and 
the specimens are indifferently preserved. With regard to fig. 14 
the correspondence is very close when compared with the decorti- 
cated surface of our specimen. The only other Se so far 
figured with which we are acquainted are Kidston,® pl. v, figs. 41-3. 
Dr. Kidston’s s specimens do not show the decorticated stage. We must 
note that he calls this a variety ‘rimosum’, while Zalessky refers it to 
the species LZ. rimosum. At any rate Dr. Kidston’s specimens, from 
the River Esk, which he regarded as belonging to the Carboniferous 
Limestone Series, indicate that the locality is almost certainly high 
up in the Coal-measures. 
This group of species, including Z. rimosum, LZ. Glincanum, and 
L. dichotomum, is one which presents many difficulties, and further 
evidence may show that these forms are more intimately connected 
than is supposed. But for the present we have no good grounds for 
regarding them as other than distinct. The fact. that the leaf-bases 
show no definite leaf-scar is also found to be usually the case in 
Lepidodendron lanceolatum, and may be characteristic of some of the 
Upper Coal- measure Lepidodendr Ons. 
1 Eichwald, Taha Rossica, vol. i, ecient Période,’’ p. 127, 
2 Kidston, Trans. Roy. Soc. Edinb., vol. xl, Bt. iv, No. 31. 
S Zalessky, Mémoires du comité géologigue N.S 1908, livraison xiii, p. 88. 
4 Thid:, 1904, livraison xiii, p. 
2 Kidston, Trans. Roy. Soc. Edinb. vol. xl, pt. iv, No. 31, pl. ii, figs. 20 and 
; pl. iv, figs. 37-9. 
ie Bichwald, Lethea Rossica, al i. 
7 Zalessky,: ‘Mémoires du comité géologique, N.S., livraison xiii, pl. iii, fig. 13. 
8 Kidston, Trans. Roy. Soc. Edinb., vol. x1, te iv, No. 381. 
