610 MR ROBERT KIDSTON ON 



Decorticated Conditions of Sigillaria. 

 Sigillaria alternans, Sternb., sp. 



Sigillaria alternans, L. and H., Fossil Flora, vol. i. pi. lvi. 



Syringodendron alternans, Sternb., Ess. flore monde prim., vol. i. fasc. 4, pp. 50 and xxiv., pi. lviii. 

 fig. 2, 1826. 



Transition Series (Lower Pennant Series). 



Locality. — Bwllfa Dare Colliery, Aberdare. 

 Horizon. — Graig Seam (Abergorchy). 



Sigillaria catenulata, L. and H. 



Sigillaria catenulata, L. and H., Fossil Flora, vol. i., pi. lviii., 1832. 



Transition Series (Lower Pennant Series). 



Locality. — Bwllfa Dare Colliery, Aberdare. 

 Horizon. — Graig Seam (Abergorchy). 



Stigmaria, Brongt. 

 Stigmaria ficoides, Sternb., sp. 



Stigmaria ficoides, Brongt., Class, d. veget.foss., pp. 9 and 28, pi. i. fig. 7, 1828. 



Variolaria ficoides, Sternb., Ess. flore monde prim., fasc. i. pp. 23, 26, pi. xii. figs. 1-3, 1820. 



TJ'p'per Coal Measures (Upper Pennant Series). 



Localities. — Cockett, near Swansea, and Count Herbert Colliery, Neath Abbey, &c. 

 Horizons. — Generally distributed throughout the series. 



Transition Series (Lower Pennant Series). 



Localities. — Bwllfa Dare Colliery; Nantmelyn Col., Aberdare, &c. 

 Horizons. — Generally distributed throughout the series. 



Middle Coal Measures (White Ash Series). 



Localities. — Cwm Avon, near Port Talbot ; Bwllfa Dare Colliery, Aberdare ; &c. 

 Horizons. — Generally distributed throughout the series. 



Var. minor, Geinitz. 

 Stigmaria ficoides, var. minor, Geinitz, Vers. d. Steinlif. in Sachsen, p. 49, pi. iv. fig. 6, pi. x. fig. 1. 



Middle Coal Measures (White Ash Series). 



Locality. — Bwllfa Dare Colliery, Aberdare. 

 Horizon. — 9 Foot Seam. 





