The diagrammatic sketch reproduced in fig. 186, C, was made from the transverse section of a small twig, slightly less than 2 cm. in its longest diameter, originally figured by Williamson[366] in 1872. Earlier in the same year Carruthers[367] published a short account of the same form based on specimens collected by Mr Butterworth from the Coal-Measures of Lancashire near Oldham, but both authors refrained from instituting a new specific name. In a later publication Williamson spoke of the type as _Lepidodendron macrophyllum_[368]. Williamson’s species has nothing to do with _Lycopodites macrophyllus_ of Goldenberg[369]. The most striking feature of this rare form is the large size of the leaf-cushions, which are of the _Lepidophloios_ type, in proportion to the diameter of the shoot. The stele consists of a ring of xylem, all of which is primary in the sections so far described, enclosing a parenchymatous pith: a Stigmarian rootlet is shown at _s_. 8. _Lepidodendron Veltheimianum_ Sternb. (General account). Figs. 157, 185, 186, A, B. 1820. “Schuppenpflanze,” Rhode, Beit. zur Pflanzenkunde der Vorwelt, Pl. III. fig. 1. 1825. _Lepidodendron Veltheimianum_, Sternberg, Flora der Vorwelt, Pl. LII. fig. 5. 1836. _Pachyphloeus tetragonus_, Goeppert, Die fossilen Farnkräuter, Pl. XLIII. fig. 5. 1852. _Sagenaria Veltheimiana_, Goeppert, Foss. Flora des Übergangsgebirges, Pls. XVII–XXIV. 1875. _Lepidodendron Veltheimianum_, Stur, Culm Flora, p. 269, Pls. XVIII–XXII. 1886. _Lepidodendron Veltheimianum_, Kidston, Catalogue of Palaeozoic plants, British Museum, p. 160. 1901. _Lepidodendron Veltheimianum_, Potonié, Silur und Culm Flora, p. 116, figs. 72–76. 1904. _Lepidodendron Veltheimianum_, Zalessky, Mém. Com. Géol. Russie, Pl. IV. figs. 4, 5. 1906. _Lepidodendron Veltheimi_, Potonié, Königl. Preuss. geol. Landesanstalt, Lief. III. The above list may serve to call attention to a few synonyms[370] of this plant, and to a selection of sources from which full information may be obtained as to the history of our knowledge of this characteristic and widely spread Lower Carboniferous type.