94 Proceedings of the Royal Physical Society. 



subepidermal leaf-scars. These are not simple as supposed/ 

 but when well preserved are seen to consist of two linear 

 elongated elevations, which are frequently connected in the 

 centre, as shown in figs, o and bh. They are very similar to 

 those of Sigillaria. 



The foliage of ^. mimitifolium and punctatum is very 

 small, and the ultimate ramifications of the dichotomously 

 divided branches have great similarity to those of recent 

 Lycopods, as has been pointed out by Zeiller. Their syste- 

 matic position is, however, probably intermediate between 

 Lejndoclendron and Sigillaria. 



The genus Bothrodendron is not, however, restricted to the 

 Coal-measures, for I have received from various localities in 

 the Calciferous-Sandstone series specimens of a species of 

 this genus, which I here describe. 



Bothrodendron Wiikianum, Kidston, u. sp. 

 (PL IV., figs. 2-4.) 



Cf. Lqndodendron Wiikianum, Heer, Foss. Flora d. Baren lusel, p. 40, 

 pi. vii., fig. 1 c ; pi. viii., fig. 2 c ; pi. ix., fig. 1. 



I)escriptio7i. — Leaf-scars distant, small, varying in size 

 according to the age of the branch, transversely oval. Cica- 

 tricules three, punctiform, situated tow^ards the lower margin 

 of the scar. Above the leaf-scar is a small punctiform cica- 

 tricule. Surface of the bark between the leaf-scars irregu- 

 larly striated longitudinally, the stride 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 

 example 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 striic being slightly 



^ Zeiller, I. c, p. 181. 



