■92 SPHENOrTEEIS. 



species has been regarded by some authors' as identical with 

 Brongniart's Tasniopteris vittata, and, so far as the small specimen 

 enables one to form an opinion, I believe the Stonesfleld Slate 

 fragment to be specifically identical with the Yorkshire Coast fern, 

 Tmniopteru vittata. No specimens of Taniopteris have been found 

 among the Stonesfield Slate plants in the British Museum. 



Genus SPHENOPTERIS, Brongniart. 



[M€m. Mus. Hist. nat. Paris, vol. Hi. p. 233, 1822.] 



Lindley & Hutton have described a fragment of a Stonesfield 

 fern as Sphenopteris cysteoides ; the same species is figured also by 

 Phillips, and this author has referred other fragments to Sphenopteris 

 plumosa and to Pecopteris approximata and P. incisa. 



None of the specimens named by these writers are sufficiently 

 large or well preserved to be made the ' types ' of new species. 



SPHENOPTERIS, sp. a. 



l[Cf. Coniopteris quinqueloha (Phill.), Geol. Torks. 3rd ed. p. 215, Lign. 33, 



1875.] 



1835. Sphenopteris cysteoides, Lindley & Hutton, Foss. Flor. toI. iii. 

 pi. clxxvia. 



1848. S. cysteoides, Bronn, Ind. Pal. p. 1168. 



1849. S. cysteoides, Brongniart, Tableau, p. 105. 

 1854. S. cysteoides. Moras, Brit. Foss. p. 21. 



1856. S. cysteoides, Zigno, Flor. foss. OoKt. vol. i. p. 79. 



1871. S. cysteoides, Phillips, Geol. Oxford, p. 168, Diag. xxviii. fig. 7. 



1874. S. cysteoides, Schimper, Trait, pal. veg. vol. iii. p. 467. 



1894. S. cysteoides. Woodward, Lower Ool. p. 600. 



The fossil figured by Lindley & Hutton from the Stonesfield 

 Slate is described as a ferruginous impression, and, judging by 

 ■other examples in the Oxford Museum and elsewhere, the type- 

 specimen was most probably too obscure and imperfect to be 

 designated by a specific name. The fragment figured by Phillips 

 is in the Osford Museum, and is too indistinct to determine, even 

 generically ; it may, however, be a fragment of a Conifer. The 

 British Museum collection does not include any specimens that 

 appear to be identical with Sphenopteris cysteoides, L. & H. 



' Brongniart (28), p. 62 ; ITnger (50), p. 212 ; Zigno (56), p. 201. 



