Arbek — The Flora of the Ballijcmtle Coalfield. 169 



1877. LepidoclendroH Veltheimianum, Stur. {pars) Abhand. K. K. Geol. 



Eeichsanst, vol. viii. (Culm. Flora, 

 pt. ii.), p. 269, pi. XXXV, figs. 2, 3 ; 

 pi. xxxvi, figs. 5, 6; pi. xxxvii, 

 figs. 1-6 ; pi. xxxviii, pi. xxxix, 

 figs. 3ff, '6b. 



1885. Lepidodendron Veltheimianum, Kidston {pars). Ann. and Mag. Nat. 



Hist., ser. 5, vol. xvi., pp. 162, 

 243 ; pi. iii, pi. iv, fig. 2 ; pi. vi, 

 figs. 11, 11«, lib. 



1903. Leindodendron Veltheimii, . Kidston,' Trans. Eoy. Soc. Edinb., 



vol. xl., pt. iv., p. 754. 



1905. Lepidodendron Veltheimi, . Fischer, in Potonie, Abbildung. 



Besohreib. Foss. Pflanz. Lief, iii. 

 No. 50. 



Localities. — In sandstone at the waste heap of White Mine Colliery ; in 

 a quarry in sandstone, 30 feet below top of cliff, 100 yards east of Ballyvoy 

 Pier ; and in shales near Ballycastle. 



Diagnosis. — Leaf-bases large, elongate, and prominent, usually separated 

 from one another by well-marked, though narrow, intervals of bark. In the 

 younger state, the leaf-bases are rhomboidal in form, about 4 to 5 times as long 

 as broad. The lateral angles are rounded, and the upper and lower angles of 

 the leaf-base are markedly prolonged, with attenuated, straight, or more 

 usually curved extremities. In the case of older branches, the leaf-bases are 

 much broader in proportion to their length, and more rhombic in form. Leaf- 

 scar usually situated a little above the centre of the leaf-base, triangular in 

 form, broader than long, the lower margin nearly straight, bearing prints of 

 the leaf-trace and parichnos. Keel prominent and sharp, usually ornamented 

 by numerous small, transverse grooves. In well-preserved specimens, two 

 scars of aerating tissues are found below the leaf-scar, one on either side of 

 the keel. Ulodendroid branches common. 



Description of the specimens. — The determination of specimens of this, the 

 best-known and most widely distributed of Lower Carboniferous Lycopods, 

 is often beset with difficulties. In the first place, the specimens, whether 

 showing the true external or a decorticated surface, are often badly preserved. 

 Where the true external surface is seen, there is found to be a very marked 

 difference in the shape and other characters of the leaf-base, according to 

 the age of the branch, and further, the cast does not at first sight resemble 



' This Memoir containa a very complete list of the figures and synonyms of this species. 

 gOIENT. PROC. R.D.S., VOL. XUI., NO. XII. 2 



