182 Mr J. M. Macfarlane on Lepidophloios. 



Fossil Plants from the Coal Formations of Cape Breton,"* 

 Bunbury gives figures and descriptions of various Coal- 

 measure plants found in that locality, one of which he 

 names Lepidodendron tumidAim, and remarks: "This is one 

 of those ambiguous forms wliich would be referred by some 

 to Lepidodendron and by others to Sigillaria." 



Schimper incorporates this as Lepidophloios tumidus. 



Lesquereux, in his " Palaeontology of Illinois,"t records 

 one species, Lepidophloios ohcordatus. 



In '' The Coal Formation of Nova Scotia and New 

 Brunswick,"! and also in " Acadian Geology," § Principal 

 Dawson enumerates five species of Lepidophloios, viz., 

 Acadicmus, j^rominuhts, parvus, platy stigma, and tetragonus; 

 but the tliird of these, as Schimper remarks, " is mani- 

 festly a Ulodendron." Dawson says, in defence of his 

 classification : " Regarding Lcpidopldoios loricinum of 

 Sternberg as the type of the genus, and, taking in con- 

 nection with this the species described by Goldenberg, 

 and my own observations on numerous specimens found in 

 Nova Scotia, I have no doubt that LomatopMoios crassi- 

 caulis of Corda, and other species of that genus described 

 by Goldenberg, Ulodendron and Bothrodendron of Lind- 

 ley, Lepidodendron ornatissimum of Brongniart and 

 Halonia punctata of Geinitz, all belong to this genus, 

 and differ from each other only in conditions of growth 

 and preservation." In the paragraph preceding that now 

 quoted he defines Lepidophloios, including, of course, 

 Ulodendron, as possessing " transversely elongated leaf- 

 scars, each with three vascular points, and placed on 

 elevated or scale-like protuberances," also " long one- 

 nerved leaves." Now, I have numerous specimens which 

 prove (1) that the leaf-scars of Ulodendron — and this 

 applies equally to Bothrodendron, its inner bark — were 

 quadrilateral and almost equilateral ; (2) that the pro- 

 tuberances were little, if at all, elevated above the bark ; 

 (3) that only one vascular point was present ; and (4) 

 that the leaves even in thick stems were short and densely 

 imbricated. Above all, the presence in Ulodendron of the 



* Quart. Jour. Geol. Soc, vol. iii. p. 123. 

 t Geol. Surv. of Illinois, vol. ii. p. 457. 

 % Quart. Jour. Geol. Soc. vol. xxii. p. 139. 

 § Second edition, London, 1868. 



