1 6 STUDIES IN GEOLOGY, No. 4 



Lindley & Hutton, Fossil Flora, vol. 3, pi. 181, 1836. 



Sauveur, Veget. foss. terr. houil. Belg. pi. 18, figs. I, 2, 1848. 



Weiss, Aus d. Steink. p. 13, pi. 12, fig. 74, 1882. 



Potonie, Zeits. Deutsch. Geol. Gesell., vol. 43, p. 756, 1892. 



Freeh, Lethsea geogn., vol. 2, pt. i, pi. soa, fig 2, 1899. 



Kidston, Proc. York. Geol. & Poly. Soc., vol. 14, pp. 191, 209, 



1901; Trans. Roy. Soc. Edinb., vol. 50, pt. i, p. 83, 1914. 

 Arber, Quart. Jour. Geol. Soc. Lond., vol. 59, p. 13, pi. 2, fig. 



3a, 1903- 



Kidston, Mem. Musee Roy. Hist. Belg., vol. 5, p. 19, 1911. 

 Hymenophyllites furcatus Goeppert, Syst. fil. foss., p. 259, 1836. 

 ' Geinitz, Vers. Steinfl. in Sachsen, p. 17, pi. 24, fig. 10, 1855 (not 



figs. 8, 9, 11). 

 Roehl, Foss. Fl. Steink. Form. Westph., p. 66, pi. 15, fig. 12, 



1869. 



Rhodea furcata Presl in Sternberg, Versuch, vol. 2, fasc. 7-8, p. 

 no, 1838. 



Diplothmema furcatum Stur, Culm Fl. pt. 2, p. 230, 1877. 

 Zeiller, Veget. foss. terr. houil., p. 45, pi. 162, fig. 3, 1880. 

 Stur, Carbon Fl. Schatz, Schichten, p. 299, pi. 28, figs. 2, 3, 1885. 

 Zeiller, Fl. foss. Bass, houil. Valenc., p. 147, pi. 4, figs. 5, 6; 



pi. 5, ng. 4, 1886. 



Sphenopteris trichomonoides Brongniart, Hist, veget. foss., p. 182, 

 pi. 48, fig. 3, 1829. 



Hymenophyllites obtusilobus Goeppert, Syst. fil. foss., p. 257, 1836. 

 Diplothmema geniculatum Stur, Carbon Fl. Schatz. Schichten, p. 

 297, pi. 28, fig. i, 1885. 



Palmatopteris furcata Potonie, Ueber einige Carbonfarne, pt. 3, p. 

 i, pi. i, tf. i, p. 3, 1892; Lehrbuch, p. 136, fig. 127, 1899; Abbild. u. 

 Beschr. foss. Pfl. Lief, 2, No. 21, (part) 8pp, i pi. figs. 1-3, 1904 

 (not figs. 4, 5). 



Gothan, Oberschles. Steinkohlenfl. Teil i, p. 77, pi. 16, figs, i, 



2, tf. 5, 1913. 



Zeiller, Fl. foss. bass. d'Heraclee, p. 28, 1899. 



Sphenopteris Hartlebenii Fuchs (not Dunker), Bol. de Minas Ind.y 

 Const, tomo 16, No. 7, p. 50, 1900. 



Sphenopteris affinis Steinmann (not L & H), Geol. Rundschau. 

 Bd. i, p. 50, 1910. 



Potonie includes Sphenopteris alata Brongniart (Hymeno- 

 phyllites Graudini Goeppert) , Sphenopteris spinosa Goeppert, 

 Trichomanes Brongniartii Ettingshausen, Sphenopteris pal- 

 mata Schimper (Diplothmema Stur) in this species and con- 



