Mr. R. Kidston on British Carboniferous Lycopods: 65 
Bothrodendron Wiikianum, Kidston, n. sp. 
(Pl. IV. figs. 2-4.) 
Cf. Lepidodendron Wiikianum, Heer, Foss. Flora d. Biiren Insel, p. 40, 
pl. vii. fig. 1c, pl. viii. fig. 2c, pl. ix. fig. 1. 
Description.—Leaf-scars distant, small, varying in size 
according to the age of the branch, transversely oval. Cica- 
tricules three, punctiform, situated towards the lower margin 
of the sear. Above the leaf-scar is a small punctiform cica- 
tricule. Surface of the bark between the leaf-scars irregu- 
larly striated longitudinally, the striz bending round the scars 
and leaving in their immediate neighbourhood a smooth 
space. 
Remarks.—The leaf-scars vary in size and distance apart 
according to the age of the specimen. In my smallest ex- 
ample they are about 1 millim. and in the largest speci- 
men 3°5 millim. in transverse diameter. On the young 
branches the little punctiform cicatricule is immediately above 
the leaf-scar and seems to rest upon it; but in the largest 
specimen of the species that I have seen it is separated from 
the leaf-scar by a short distance. 
The bark is longitudinally striated, the striz being slightly 
bent, especially in the neighbourhood of the leaf-scars round 
which they curve, and immediately below and above the 
leaf-scars they are absent, having the appearance as if they 
had separated to make room for the scars. There is, how- 
ever, no “ field,” as in Lepidodendron. 
I have named this species ‘‘ Wiikianum” as there seems to 
be a great probability that this plant is similar to Heer’s 
Lepidodendron Wiikianum, from Bear Island *. The British 
specimens are not, however, referable to the genus Lepi- 
dodendron, and, judging from Heer’s figures and descrip- 
tion, I do not think that his plant should be placed in 
that genus. As, however, I have not seen any of Heer’s 
specimens, I cannot be certain that his species is identical 
with my Bothrodendron Wiikianum, though I am strongly 
inclined to believe it is. I therefore, while adopting his 
specific name, place the British specimens in their proper 
genus; and should it eventually be proved that these twe 
species are identical, it will be an easy transition to substitute 
Bothrodendron Wiikianum, Heer, sp., for Bothrodendron 
Wikianum, Kidston. 
Localities. Kailway-cutting between Boags Mill and Kates 
* In Kongl. Svenska Vetenskaps-Akademiens Handlingar, Band ix, 
no. 5 (Stockholm, 1871). 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. By) 
