44 YORKSHIRE NATURALISTS* UNION. 



Hor. — Barnsley Rock}* Loc. — Quarry, near Rawmarsh 

 (Artis, type). 



Note. — Very rare. The counterpart of the type is 

 preserved in the British Museum. 



LYCOPODIACEiE. 



LEPIDODENDRON Sternb. 

 Lepidodendron dichotomum Sternb. (in part). 



Lepidodendron dichotomum Sternb., Vers, i, fasc. i, pp. 19 and 

 23, pis. i and ii (not pi. iii) ; vers, ii, p. 177, pi. Ixviii, 

 fig.i (1820). 

 Lepidodendron Sterfibergii ^rongi., Prodrome, p. 85 (1828). 



Middle Coal Measures. 



Hor. — Woolley Edge Rock. Loc. — Barnsley (Hemingway). 



Hor. — Barnsley Thick Coal. Locs. — East Gawber Col- 

 liery, near Barnsley (Hemingway). Monckton Colliery, 

 near Barnsley (Gelder). 



Hor. — Better Bed Coal. Loc. — Clifton, near Halifax 

 (Spencer). 



Lower Coal Measures. 



Hor. — Rag above Freestone. Loc. — Northowram, near 

 Halifax (Cash). 



Remarks. — Lepidodendron dichotomum Sternb. {^^Lepi- 

 dodendron sternbergii Brongt.) is frequently referred to 

 as occurring in Britain, but when the matter is critically 

 looked into, it is very difficult to ascertain what are the true 

 characters of this species. Some authors regard Lepid. 

 ophiurus Brongt. as a distinct species, but for my own part 

 I am inclined to regard it as simply the younger branches 

 of Lepidodendron dichotomum. From the examination of 

 the specimens named Lepidodendron sternbergii in the 



* Mr. Hemingway says in regard to the horizon of Artis' type specimen, The 

 Barnsley Rock is well developed (90 ft.) at Rawmarsh where it is quarried. I 

 have but little doubt as to this being the rock from which Artis obtained his 

 type of M. frondnsum. 



Geol. Trans. Y.N.U., 1888 (pub. 1890). 



