172 Scientific Proceedings, Royal Dublin Society. 



3. Lepidodendron : cf . L. Rliodeanum, Sternberg. 

 Plate XII, fig. 12. 



1821. Ehode, Beitr. Pflanzeiik. Vorwelt, Lief i., 



p. 7, pi. i, figs, la, 3, 4. 

 1833. Lepidodendron Rliodeanum, Sternberg, Vers. Darstell. Flora. Vorwelt., 



vol. i., pt. 5-6, p. xi. 

 1852. Sagenaria depressa, . . GrCBppert, Acad. Csesar. Leopold. Natur. 



Curios., vol. xxii. ; suppl. vol., p. 179, 

 pi. xliii, figs. 5 and 6. 

 1877. Lepidodendron Rliodeanum, Stur, Abhandl. K. K. Geol. Reicbsanst, 



vol. viii, (Culm flora, pt. ii.), p. 283, 

 pi. xl, figs. 1 and 3 (? fig. 2). 

 Locality. — Ballycastle. 



Diagnosis. — Leaf-bases of medium size, broadly rbomboidal, contiguous, 

 nearly as broad as long. Leaf-sear placed above middle of the leaf-base ; 

 elongate, upper angle rounded, lateral angles acute, lower angle wide, lower 

 lateral margins concave to base of cushion. Keel well marked (?), without 

 transverse ridges. 



Description. — The photograph on Plate XII,fig. 12, is taken from a specimen 

 in the Survey collection, labelled Lepidodendron Sternhergi, from Ballycastle. 

 The preservation is not very good, but the specimen appears to me to be 

 comparable to some of those previously referred to L. Rhodeanum of Sternberg, 

 and particularly to Stur's figure (see above) on plate xxiv, fig. 3. Lepido- 

 dendron Rhodeanum is a somewhat rare plant. It is known from Scotland, 

 from the Carboniferous Limestone series, and from the Arigna Mines in 

 Ireland. It also occurs in the Lower Carboniferous of Germany (Saxony), 

 and in the Ostrau and Waldenburg Schichten of Silesia and Moravia. The 

 species, however, is still imperfectly known and defined. 



Stigmaria, Brongniart. 



Stigmaria ficoides (Sternberg). 



Plate X, fig. 4. 



1820. Variolaria ficoides, Sternberg, Vers. Darstell. Flora Vorwelt., vol. i., 



pt. i., pp. 22, 24, pi. xii, figs. 1-3. 

 1828. Stigmaria ficoides, Brongniart, Class. Veget. foss., p. 228, pi. i, 



fig. 7. 

 1903, Stigmaria ficoides, Kidston,' Trans. Roy. Soc. Edinburgh, vol. xl., 



pt. iv., p. 757. 



' A complete list of the figures and synonyms of this fossil is here included. 



