Mr. R. Kidston on British Carboniferous Lycopods. 63 
tain that Sigillaria Menardi, Lesqx. (not Brongn.)*, which 
Zeiller unites with U. majus, is likewise referable to Stig. 
discophora (=U. minus, L. & H.). The type of U. majus 
appears to be lost, but the counterpart of the type of U. minus 
is still preserved in the Hutton Collection, Newcastle-on- 
Tyne, and on the careful examination of this my identifica- 
tions have been made. 
III. Bornropenpron, L. & H. 
Bothrodendron, L. & H., Fossil Flora, vol. ii. p. 1 (1833). 
Rhytidodendron, Boulay, Le terrain houiller du nord de la France et 
ses végétaux fossiles, p. 89 (1876, Lille). 
In 1885 I recorded the occurrence of Rhytidodendron 
minutifolium, Boulay, from Scotland, and regarded the genus 
as distinct from all others; but to M. Zeiller we are indebted 
for showing that Rhytidodendron, Boulay, is none other than 
Bothrodendron, L. & H. To the defective descriptions of 
Lindley and Hutton must be ascribed the cause of this genus 
being so imperfectly known; and had it not been for the 
discovery of an original specimen, communicated by Hut- 
ton to the Museum of Natural History, Paris, the cloud 
that enveloped this genus might have hung over it much 
longer fT. 
In M. Zeiller’s memoir, to which I have already referred, 
he figures stems and branches of Bothrodendron punctatum, 
the latter having their foliage attached. Recently I have 
met with specimens of BL. punctatum as also with additional 
examples of B. ménutifolium in Britain. The latter species I 
have found in several new localities, and it is represented by 
stems and branches with their foliage attached. B. puncta- 
tum I have only yet seen from the Kilmarnock Coal-field, 
and for specimens of it I am again indebted to the Rev. D. 
Landsborough and to Mr. Blackwood, Kilmarnock. 
The leaf-scars in this genus are very small and provided 
with three punctiform cicatricules. On the young growing 
branches the leaf-scars of some of the species are close and 
surrounded by a Lepidodendroid-like “field,” but this entirely 
disappears on the larger stems where the leaf-scars are distant ; 
the surface of the bark between the leaf-scars is beautifully 
ornamented by delicate lines and granulations. 
* Geol. Survey of Illinois, ii. pl. xliii. 
+ Iam greatly indebted to M. Zeiller for figuring at my request the 
authentic specimen of Bothrodendron punctatum, L. & H., which had 
been presented to the Muséum d’histoire naturelle by Hutton and to 
which reference has been nade (Zeiller, /. c. pl. viii. fig. 1). 
