328 PROCEEDINGS COTTESWOLD CLUB 1912 



The Yorkley Seam 



The Yorkley Seam is worked alone at two collieries, Park 

 Gutter Colliery, close to Whitecroft Station, and at Flour Mill 

 Pit, another colliery also belonging to the Princess Royal Col- 

 lieries Co., and situated about a mile N.W. of Park Gutter, with 

 which it is connected by a cable tramway. So far as I am 

 aware, the heaps of these collieries are the only locahties in 

 the Forest at the present time where the rocks associated with 

 this seam can be studied. That at Park Gutter is very rich 

 in fossil plants, which are often exceedingly well preserved. 

 On the two occasions when the author visited Flour Mill Pit 

 in different years, plants appeared to be very much less abun- 

 dant than at Park Gutter. 



One of the commonest fossils at Park Gutter is the frond 

 of Sphenopteris neuropteroides (Boul.), Plate XXXIX., fig. 17, 

 of which beautiful examples can usually be obtained, many of 

 which show casts of Spirorbis attached to the pinnules. 

 Good specimens of the rare Calamitean cone Macrostachya also 

 occur. The following plants are also common here : — 



Sphenopyllum ernarginatum, Brongn., Neuropteris ovata, 

 Hoffm., Plate XXXVII., fig. 6, Marioptens nmricata (Schloth.), 

 Plate XXXVII., fig. i, Pecopteris polymorpha, Brongn., Plate 

 XXXVII., fig. 3, and Lepidodendron aculeatum, Sternb., Plate 

 XXXIX, fig. 16. The following are among the rarer fossils : — 

 Sphenophyllummajus {Bvonn), Neuropteris macropkylla.Brongn., 

 and Pecopteris {Dadylotheca) plumosa (Artis), Plate XXXIx] 

 fig. 14. 



Several of these plants also occur at Flour Mill Colliery, 

 with the addition of Neuropteris Scheuchzeri, Hoffm., Plate 

 XXXIX., fig. 12, Odontopteris Lindleyana, Sternb., and Lepi- 

 dodendron dichotomum, Sternb. The two last-named species are 

 very infrequent in the Forest. 



The Coleford High Delph Seam 



As we have pointed out, the roof of this important seam 

 consists, with very rare exceptions, of sandstones, which do 

 not contain fossil plants. In April, 1909, however, Mr John 



