LYCOPODITES VAKUXEMI IN BRITAIN. 565 



specific name for a plant which has so long gone under the 

 distinctive appellation of "Vanuxemi," I trust that this note of 

 warning may avoid any confusion in future between Lycopodites 

 (Sigillaria) Vanuxemi, Goppert, and Ptilophyton (Lycopodites) 

 Vanuxemi, Dawson. 



These notes are concluded with a description of Lycopodites 

 Vanuxemi, Goppert, sp., embodying the additional characters ob- 

 served on the British examples. 



Lycopodites Vanuxemi, Goppert, sp. 

 1842. Vanuxem. Geol. of New York, part iii. p. 184, fig. 51. 

 Sigillaria Vanuxemi. 



1852. Goppert. Toss. Flora d. Uebergangsgebirges, p. 219 

 (Verb. d. k. Leop. -Carol. Akad. d. Natur. vol. xxii. Supp.). 



1862. Dawson. Quart. Journ. Geol. Soc. vol. xviii. p. 307, 

 pi. xii. fig. 7. 



1863. Hall. 16th Annual Keport on Condition of State Cabinet 

 of Nat. Hist. p. 113 : Albany. 



1871. Dawson. Fossil Plants of Devon, and Upper Silur. Form. 



of Canada, part i. p. 21. 

 1880. Lesquereux. Coal Flora of Pennsyl. vol. ii. p. 505. 

 ? Knorria imbricata (in part). 

 1869. Ludwig. Pflanzenreste aus den palaolithischen Forma- 



tionen der TJmgegend von Dillenburg, Biedenkopf und 



Friedberg und aus dem Saalfeldischen. Palaeontographica, 



vol. xvii. p. 124, pi. xxvi. fig. 5. 



Description: — Stem dividing dichotomously and attaining a 

 diameter of over 2-5centim.; leaf-scars arranged in spirals, on 

 the younger branches fusiform, resting upon 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 cordate-acuminate. 

 Fructification unknown. 



Remarks :— The small fragment of a stem figured by Ludwig 

 as Knorria imbricata (I. c.) may perhaps belong to this species, 

 at least the figure leads one to this conclusion. 



Horizon.— The type of the species was discovered in the Upper 

 Devonian (Chemung Group) of New York, but the British ex- 

 amples originate from a higher horizon. 



