40 TRANSACTIONS, NATURAL HISTORY SOCIETY OP GLASGOW. 



1885. Lycopodites Vantixend. Kidston: Linn. Soc. Jour. Bot., 

 Vol. XXI., p. 560, PI. XVIII. 



Descrijition. — Stem dividing dichotomously and attaining a 

 diameter of over 2-5 cm. Leaf-scars arranged in spirals; on the 

 younger branches fusiform, touching each other laterally, but 

 separated vertically by a slight interval; those on the older 

 branches hexagonal and contiguous. Vascular cicatricule single 

 and situated slightly above the centre, leaves deltoid acuminate. 

 Fructification unknown. 



Horizon and Localities. — The type of the species was discovered 

 in the Upper Devonian (Chemung Group) of New York. 



The British specimens were collected in the neighbourhood of 

 Shap Toll-Bar, "Westmoreland, from the lower beds of the 

 Mountain Limestone as developed in that area. These rocks are 

 probably of the same age as part of the Calciferous Sandstone 

 Series of Scotland. 



III. Lepidodendron, Sternberg, 1820. 



1820. Lejndodendron. Sternberg: Essai Jlore monde prim., I. 



fasc. I., pp. 20 and 25; fasc. IV., p. 10. 

 1828. Lepidodendron. Brongniart : Prodrome, p. 84. 

 1822. Sagenaria. Brongniart: Class, d. veget. foss., p. 9. 

 1824. Lepidolepis. Sternberg: Ussai Jlore monde p7-im,., 1. iasc. 



IIL, p. 39. 

 1826. Knorria. Sternberg : Essai flore monde ^yritn., I. fasc. IV., 



p. 37. 

 1838. Bergeria. Presl, in Sternberg: Essai Jlore monde prim., 



11. fasc, 7-8, p. 183 (in part). 

 1838. jLs^ndiaria. Presl, in Sternberg : Essai Jlore monde jjrim., 



II. fasc, 7-8, p. 180 (in part). 

 Description. — Plants of arborescent growth, attaining to a 

 height of a hundred feet. Stem, dividing dichotomously and 

 forming a much ramified head. Outer surface of bark bearing 

 contiguous or more or less distinct rhomboidal or fusiform 

 ctishions on whose surface, generally slightly above the centre, 

 is situated the lea/scar. Within the leaf-scar are three puncti- 

 form cicatricules, the central of which is the scar of the leaf- 

 bundle — the two lateral are possibly glandular organs — the 



