222 MR ROBERT KIDSTON ON 



EXPLANATION OF PLATES. 

 Plate I. 



Fig. 1. Dactylotheca plumosa Artis, sp. (Typical form). Loc. Monckton Main Colliery, near Barnsley, 

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

 Reg. No. 2107. Seep. 213. 



Fig. la. Two pinnules, x 4. 



Fig. 2. Dactylotheca plumosa, Artis, sp. (Pecopteris dentata, Brongt.). Loc. Monckton Main Colliery, 

 near Barnsley, Yorkshire. Hor. Barnsley Thick Coal. Middle Coal Measures. Natural size. W. Heming- 

 way, Collector. Reg. No. 2112. See p. 214. 



Fig. 2a and 26. Pinnules, x 4. 



Fig. 3. Dactylotheca plumosa, Artis, sp. (Pecopteris caudata, L. and H.). Loc. Adderley Green, near 

 Longton, Staffordshire. Hor. Below New Mine Coal. — The uppermost seam in the Lower Coal Measures. 

 Natural size. J. Ward, Collector. Reg. No. 357. See p. 214. 



Fig. 3a. Pinnule, x 4. 



Fig. 4. Dactylotheca plumosa, Artis, sp. Loc. Monckton Main Colliery, near Barnsley, Yorkshire. Hor. 

 Shale over Barnsley Thick Coal. Middle Coal Measures. Natural size. "W. Hemingway, Collector. Reg. 

 No. 2111. Seep. 214. 



Fig. 4a. Portion of pinna, x 4. 



Plate II. 



Fig. 5. Dactylotheca plumosa, Artis, sp. (Sphenopteris crenata, L. and H.). Fruiting specimen. Loc. 

 Woolley Colliery, Darton, near Barnsley, Yorkshire. Hor. Barnsley Thick Coal. Middle Coal Measures. 

 Natural size. W. Hemingway, Collector. Reg. No. 1215. See p. 215. 



Fig. 5a. Pinnule, x 4. 



Fig. 5b. Sporangium, x 26. 



Fig. 6. Dactylotheca plumosa, Artis, sp. Circinately coiled up specimen showing the Aphlebia. (Schizop- 

 teris adnasceus, L. and H). Loc. Monckton Main Colliery, near Barnsley, Yorkshire. Hor. Barnsley 

 Thick Coal. Middle Coal Measures. Natural size. W. Hemingway, Collector. Reg. No. 1212. Seep. 216. 



Fig. 7. Dactylotheca plumosa, Artis, sp. (Sphenopteris crenata, L. and H, and Schizopteris adnascens, L. 

 and H.). Portion of a large specimen showing the Aphlebia attached to the rachis at the point of insertion 

 of the pinnae. Loc. Monckton Main Colliery, near Barnsley, Yorkshire. Hor. Barnsley Main Coal. Middle 

 Coal Measures. Natural size. W. Hemingway, Collector. Reg. No. 1210. See p. 216. 



Fig. 8. Dactylotheca plumosa, Artis, sp. Loc. Monckton Main Colliery, near Barnsley, Yorkshire. Hor. 

 Barnsley Thick Coal. Middle Coal Meaaures. Natural size. W. Hemingway, Collector. Reg. No. 2105. 

 See p. 219. 



Fig. 9. Dactylotheca plumosa, Artis, sp. Fruiting specimen. Loc. Monckton Main Colliery, near 

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

 Collector. Reg. No. 2088. See p. 218. 



Fig. 9«. Two pinnules, showing the arrangement of the sporangia. 



Fig. 9 b. Another pinnule, showing the sporangia. 



Fig. 9c. A sporangium, x 25. 



Fig. 14. Dactylotheca plumosa, Artis, sp. Sporangia, x 28 from another specimen which shows the 

 Aphlebia attached to the rachis. Loc. Monckton Main Colliery, near Barnsley, Yorkshire. Hor. Barnsley 

 Thick Coal. Middle Coal Measures. W. Hemingway, Collector. Reg. No. 2092. See p. 218. 



Plate III. 



Fig. 10. Dactylotheca plumosa, Artis, sp. Aphlebia (Schizopteris adnascens, L. and H.). Loc. Near 

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

 Collector. Reg. No. 2110. See p. 216. 



