THE FOSSIL FLORA OF THE YORKSHIRE COAL FIELD. 223 



Fig. 11. Dactylotheca plumosa, Artis, sp. (Sjphenopteris crenata, L. and H.). Loc. Shropshire. Hor. 

 Middle Coal Measures. Natural size. Reg. No. 966. See p. 217. 



Fig. 11a. Ultimate pinna, x 4. 



Fig. 116. Two pinnules, showing nervation more highly enlarged. 



Fig. 12. Dactylotheca plumosa, Artis, sp. (Approaching the form named Sphenopteris crenata, L. and 

 H.). Loc. South Kir by Colliery, near Pontefract, Yorkshire. Hor. Barnsley Thick Coal. Middle Coal Mea- 

 sures. Natural size. W. Hemingway, Collector. Reg. No. 2109. See p. 217. 



Fig. 13. Dactylotheca plumosa, Artis, sp. Portion of a specimen, showing the organic union of typical 

 " Filiates plumosus, Artis," and Sphenopteris crenata, L. and H. Loc. Monckton Main Colliery, near Barnsley, 

 Yorkshire. Hor. Barnsley Thick Coal. Middle Coal Measures. Natural size. W. Hemingway, Collector. 

 Reg. No. 2101. See p. 217. 



Fig. 13a. Two pinnules from the upper portion of the specimen corresponding to the " Filiates plumosus, 

 Artis," x 4. 



Figs. 136 and c. Two pinnules from a lower part of the specimen corresponding to the Sphenopteris 

 crenata, L. and H. 



Note. — All the figured specimens are in the author's collection. 



