CONTRIBUTIONS TO OUR KNOWLEDGE OF BRITISH PALAEOZOIC PLANTS. 711 



on that at fig. 2. On the typical plant the leaves seldom exceed 0'80 mm. to 1 cm. 

 in length. The specimens were collected by Mr A. Macconochie, and are preserved 

 in the Collection of the Geological Survey, Edinburgh. 



Localities. — Meadow Bank Pit, \ mile south of Polmont, and No. 13, Callender 

 Pit, \ mile S.S.E. of the Glen, near Falkirk, Stirlingshire. 



Horizon. — Shale resting on Ball Coal. Lanarkian Series. 



Sigillaria elegans Stemb., sp. (PL II, figs, l, la, 2, 3, 4 ; PI. Ill, 



figs. 4 and 8, 8a.) 



1826. Favularia elegans, Stemb., Essai flore monde prim., vol. i, fasc. iv, pp. xiv and 48, pi. lii, fig. 4. 

 1836. Sigillaria elegans, Brongt., Hist. d. vegk.foss., p. 438, pi. cxlvi, fig. 1 ; pi. civ ; pi. clviii, fig. 1. 



1886. Sigillaria elegans, Zeiller, Flore foss. bassin liouil. d. Valen., p. 582, pi. lxxxvii, figs. 1-4. 



1887. Sigillaria elegans, Weiss, Sigillarien d. preuss. Steinlc. : I, Gruppe Favularien, p. 32, pi. (4) x, 



figs. 38-41, 43-50. {Includes varieties.) 

 1911. Sigillaria elegans, Kidston, "Vt'get. houil. dans le Hainaut beige," Mem. Musee roy. d'hist. nat., 



vol. iv, p. 185.* 

 1887. Sigillaria elegantula, Weiss, I.e., p. 44, pi. (7) xiii, figs. 74-78. (Includes varieties.) 

 1905. Sigillaria elegantula, Koehne in Potonie, Abbild. u. Beschreib. foss. Pftanzen-Reste, Lief, iii, 



No. 52, figs. 1-17 (? 18), 19-30. (Includes varieties.) 

 1887. Sigillaria lorienta, Weiss, I.e., p. 18, pi. (1) vii, figs. 3, 4. (Includes varieties.) 

 1905. Sigillaria lorirata, Koehne in Potonie, I.e., No. 54, figs. 1-6. 



1887. Sigillaria squamata, Weiss, I.e., p. 25, pi. (2) viii, figs. 17-22. {Includes varieties!) 

 1887. of. Sigillaria microrhombea, Weiss, I.e., p. 17, pi. (1) vii, figs. 1, 2. (Includes varieties.) 

 1905. Sigillaria microrhombea, Koehne, I.e., No. 53, fig. 3 (? figs. 1, 2.) 

 1887. cf. Sigillaria fossorum, Weiss, I.e., p. 28, pi. (3) xi, figs. 25-32. (Includes varieties.) 

 1905. cf. Sigillaria fossorum, Koehne in Potonie, I.e., No. 55, figs. 1-14 (? 15), 16-18 (1 19-22). 

 1887. Sigillaria Fannyana, Weiss, I.e., p. 35, pi. (5) xi, figs. 51, 52. 



Remarks. — Some palseobotanists hold the opinion that the plant figured under 

 the name of Sigillaria elegans by Brongniart is not the same species as that to which 

 Sternberg applied the name of Favularia elegans, and with which Brongniart identi- 

 fied his specimens. This view was adopted by Weiss, who proposed to restrict the 

 name of Sigillaria elegans Brongt. (non Sternb.) for those specimens whose cushions 

 were smooth or nearly smooth below the leaf scar, while for those whose cushions 

 below the leaf scar are provided with two diverging lines or ridges he proposed the 

 name of Sigillaria elegantula. These differences are not constant and are found even 

 on the same specimen. Sigillaria elegans Brongt. is therefore now united, by those 

 who believe that the S. elegans Brongt. is not the Favularia elegans Sternb., 

 with Sigillaria elegantula Weiss. On the other hand, those who believe that 

 Brongniart was correct in identifying his specimens with the Favularia {Sigillaria) 

 elegans Sternb. unite Sigillaria elegantula Weiss with that species, and this is the 

 view that is adopted here. 



From what has been already said, it will be seen that Sigillaria elegans is a 

 variable species, and some interesting variations in the form of the leaf scars and in 



* Full references and synonymy are given here. 



