114 YORKSHIRE NATURALISTS UNION. 
Sigillaria solena Wood, ‘Trans. Amer, Phil. Soc., vol. xiii., 
p. 341, pl. viii., fig. 5, 1869. 
‚Sieillaria marginata Lesqx., Atlas to the Coal Flora, pl. Ixxi., 
fig. 5, 1879, (text) Coal Flora, p. 498, 1880. 
Sigillaria lacoei Lesqx., Atlas to the Coal Flora, pl. lxxii, 
fig. 12, 1879, (text) Coal Flora, p. 499, 1880. 
MIDDLE CoAL MEASURES. 
Hor.—Barnsley Thick Coal. Locs. — Monckton Main 
Colliery, near Barnsley ; Woolley Colliery, Darton, near 
Barnsley. 
Norn.—Sigillaria deutschiana Brongt., Sigillaria ru- 
gosa Brongt., and Sigillaria elongata Brongt., form a group 
of very closely related species, which should be very care- 
fully collected whenever an opportunity offers. 
Sigillaria elongata Brongt. 
Sigillaria elongata Brongt., Prodrome, p. 64, 1828. Hist. d. 
végét. foss., p. 473, pl. cxlv., pl. cxlvi., fig. 2, 1836. 
Sigillaria elongata Sauveur, Végét. foss. terr. houil. de la 
Belgique, pl. lvi, figs. 2—3, 1848. 
Sigillaria elongata Goldenberg, Flora saræp. foss., heft ii., 
p. 46, pl. vii. figs. 23, 24, 25, 1857. 
Sigillaria elongata Roehl, Foss. flora d. Steink. Form. Westph., 
p. 108, pl. xxx. fig. 1 (fig. not very accurate), 1869. 
Sigillaria elongata Schimper, Traité palæont. végét., vol. i, 
p. 91, pl. lxviii., fig. 8, 1870. 
Sigillaria elongata Schimper, in Zittel, Handb. d. Palæont, 
vol. ii., p. 200, fig. 147, 1880. 
Sigillaria elongata Weiss, Aus d. Steink, and ed., p. 6, pl. il., 
figs. 13—14, 1882. 
Sigillaria elongata Zeiller, Ann. d. Sc. Nat., 6, Sér. Bot., vol. 
xix., p. 269, pl. xii., fig. 7, 1884. 
Sigillaria elongata Zeiller, Flore foss. d. bassin houil. d. Valen., 
p. 545, pl. Ixxxi., figs. 1—9, 1886 ; text, 1888. 
Geol. Trans. Y.N.U., 1893. 
