1903. KiDSTON. — Fossil PluJits from the Arigna Mines. 95 



E. IyOCAl,iTY.— Debris heaps, Gubbarudda, Kilronan. 

 Horizon.— ? 



Lcpidodendron VeltheiiYiIanum, Sternb. 

 Lepldodendron Rhodeanutn, Sternb.' 

 Stlgrmaria ficoldes, Sternb., sp. van 



These debris heaps are from an old disused pit on the same 

 hill as the Aghabehy Mine, but separated from it by one or 

 two faults. 



Remarks.— Though the number of species contained in the 

 collection is small, they are all of species restricted to and 

 characteristic of Lower Carboniferous rocks. In the Arigna 

 coal-field Lcpidodendron Veltheimianum, Sternb., is very com- 

 mon. Lepidode7idro7i Rhodea7tum, Sternb., was represented by 

 two specimens, but it is a comparatively rare plant in Britain. 

 Of Asterocalatftites scrobiailatus, Schl. sp., there were about 

 half a dozen examples. Stigmaria ficoides var. rimosa, Gold., 

 is very rare. 



All these species, with the exception of the Stigmaria 

 ficoides var. rimosa, Gold., are common to both the Carboni- 

 ferous Limestone series and the Calciferous Sandstone series, 

 but the position of the beds from which the fossils were 

 derived shows that the Arigna coal-field is of Yoredale Age — 

 which is on or about the horizon of the Carboniferous Lime- 

 stone series of Scotland, and probably about the position of 

 the Edge Coal series of Scotland. 



The collection contained no remains of fossil ferns, and 

 Mr. Ryans informed me that he had not seen any. 



Stirling. 



