OF COAL-MEASURE PLANT-IMPRESSIONS. 197 
Kidston’s most recent synonymy (16. p. 795), which, however, pre-dates 
the proposal to establish L. simile, Jongmans, also contains the above 
reference to Renault, but not to Brongniart. Many of the figures here 
referred to simply relate to leafy branches, in which the leaf-base characters 
cannot be distinguished. This is the case with Kidston’s own figure 
published in 1902 and those of Feistmantel (1875). 
Diagnosis of L. lycopodioides, Sternb. 
Leaf bases approximate, separated by slight grooves, rhomboidal, some- 
what prominent, usually longer than broad, very varied in size, ranging up 
to 17 mm. in length and 4 mm. in breadth, lateral angles rounded, upper 
and lower extremities usually straight, more rarely slightly bent, very acute. 
Leaf scar a curved triangular or semi-lenticular slit, narrower than the 
leaf base and placed considerably above its centre, sometimes near the apex, 
at others some distance below it. From the lateral extremities of this slit, 
two lines or ridges curve obliquely downwards to meet the margin of the 
leaf base, at about the level of the lateral angles. A distinct but slight keel 
is present, both above and below the slit, though sometimes the keel is faint, 
the lower keel being usually ornamented by short and slight transverse 
ridges, especially in the lower part of its length. No sub-parichnoid prints 
occur below the leaf slit. 
3. LEPIDODENDRON OPHIURUS (Brongn.). 
(Pl. 12. figs. 23-26.) 
Revised synonymy of Lepidodendron ophiurus (Brongn.) :— 
1822. Sagenaria ophiurus, Brongn., in Mém. Mus, Hist. Nat. vol. viii. p. 227, pl. 15 (4). 
fig. 1 a-b. 
1828. Lycopodiolites Ophyurus, Bischoff, Kryptogam. Gewächse, pp. 117, 131, pl. 13. 
figs. 6 a, 6b. . 
1838, Lepidodendron elegans, Brongn., Hist. Végét. Foss. vol. ii. p. 35 (footnote), pl. 14. 
1838. Lepidodendron gracile, Brongn., ibid. pl. 15. 
1848. Lepidodendron ophiurus, Sauveur, Végét. Foss, Terr. Houill. Belgique, pl. 59. 
figs. 2a, 2b. 
1878-79. Lepidodendron gracile, Zeiller, Explie. Carte Géol. France, vol. iv. pt. 2, pt 112, 
pl. 172. fig. 2. 
1882. Lepidodendron Iycopodioides, Renault, Cours Bot. Foss. vol. ii. p. 14, pl. 5. fig. 8. 
1886-88, Lepidodendron ophiurus, Zeiller, Flore Foss. Bass. Houill. Valenciennes, 
p. 458, pl. 68. figs. 1-6. 
1903. Lepidodendron Glincanum, Kidston, in Trans. Roy. Soc. Edinb. vol. xl. p. 762, 
pl. 2. figs. 20, 21; pl.-4. figs. 87-40. 
1904. Lepidodendron ophiurus, Zalessky, in Mém. Com. Géol. St. Pétersbourg, N.S. 
Livr. 13, pp. 28, 95, pl. 5. figs. 1, 2, 4, 6. 
1906. Lepidedendron ophiurus, Fischer, in Potonié Abbild. und Beschr. Foss, Pflan. 
Lief. 4, No. 73 with fig. 
1912> Lepidodendron simile, Vernon, in Quart. Journ. Geol. Soe. vol. lxviii. p. 621, 
pl. 97. fig. 7. 
