DEVONIAN. 233 



Lepidodendron Gaspianum. 



Crepin, Bull. Soc. Roy. Bot de Belgique, vol. xiv. p. 218, pis. iii., iv., and v. 



Lepidodendron Burnotense. 



Gilkinet, Bull. A cad. Eoy. de Belgique, 2 e ser. vol. xl. p. 141, figs. 2, 4, 

 and 5 (fig. 5 in part), 1875. 



Hostinella hostinensis. 



Stur, Sitzb. der k. Akad. der. Wissensch. vol. Ixxxiv. 1 Abth. heft 



1 and 2, 1881, p. 352, pi. iii. figs. 1 and 2, pi. iv. figs. 1-8. 

 Lycopodite ? 



Miller, Testimony of the Eocks, p. 24, fig. 12, 1857. 

 " Terrestrial plant allied to Lepidodendron.'" 



Miller, Testimony of the Rocks, p. 432, fig. 120, 1857. 



Fucoids. 



Miller, Testimony of the Rocks, p. 429, fig. 119, 1857 (left hand figure.) 



Vegetable impressions. 



Miller, Old Red Sandstone, p. 117, pi. vii. figs. 3-8, 1865. 



Footprints of the Creator, pp. 194, 196, figs. 61 and 62a, 6, 1863. 

 " Plant." 



Vanuxem, Nat. Hist, of New York, Geol. pt. iii. p. 161, fig. 40, 1842. 



Rootlets. 



Salter, Quart. Journ. Geol. Soc. vol. xiv. p. 74, pi. v. figs. 3-6 (? not 



fig. 7). 

 Young shoot of a Coniferous ? plant. 



Salter, Quart. Journ. Geol. Soc. vol. xv. p. 408, fig. 146. 



Remarks. From many associations this is one of the most interesting of 

 Palaeozoic plants with which the Botanist has to deal. The earliest figure of 

 Psilophyton Dechenianus with which I am acquainted is that given by 

 Vanuxem, which is merely referred to by him as a " Plant." In 1847 the 

 name of Haliserites Dechenianus was given by Goppert to some fossils from 

 the " Transition Rocks," which, however, were not figured by him till the 

 appearance of hisFossile Flora der Ubergangsgebirges in 1852, where on 

 plate ii. several specimens are illustrated. These are very fragmentary 

 examples, but all the characters they show agree in every particular with 

 the fossil which was described by Sir J. W. Dawson as Psilophyton robustius 

 (Quart. Journ. Geol. Soc. vol. xv. p. 481, 1859), but more fully in 1871 

 (Fossil Plants, Devon, and Upper Sil. Form, of Canada, p. 39, pi. x. fig. 121, 

 pi. xi. figs. 130-132, and pi. xii.). That Psilophyton robustius, Dawson, is 

 founded on more perfect specimens of Haliserites Dechenianus seems to me 

 certain. Sir J. W. Dawson himself points out that there can be little doubt 

 that the species Haliserites Dechenianus, Goppert, is founded on badly 

 presented specimens of Psilophyton. 



I am, however, of opinion that they are the same species, and therefore 

 unite them, for though Dawson's examples are in a much better state of 

 preservation than the fossils figured as Haliseites Dechenianus by Goppert, 

 they possess all the characters of this last-mentioned plant, with the addition 

 of other characters consequent on their more perfect state of preservation. 

 Sir J. W. Dawson has been successful in finding specimens of his Psilophyton 

 robustius with the internal structure preserved. He says the stem is 

 composed of a thick vascular axis of scalarifcrrn vessels, surrounded by 

 parenchymatous cells : those towards the periphery of the stem are elongated, 

 and much firmer in texture. 



Mr. Carruthers, in his paper " On some Lycopodiaceous Plants from the 

 Old Red Sandstone of the North of Scotland,"* has clearly demonstrated 

 that the plants figured by Hugh Miller in his Old Red Sandstone, Testimony 

 * Journ. Botany, 1873, vol. ii. p. 321. 



