76 BUFFORDIA. 



which showed fertile pinnae but no sporangial structure ; he 

 compared the sterile pinnules to those of Anemia adiantifolia, 

 Sw., from Cuba. 1 Schimper 2 does not admit the correctness of 

 Dawson's determination ; and, indeed, an inspection of the figures 

 of Cyclopteris (Aneimitez) Acadica, Dawson, does not lead one 

 to accept the specimens as evidence for the existence of the 

 Schizaceae in pre-Carboniferous times. 



The plants included under Ruffordia are all referred to one 

 species, some of the specimens being placed in a variety to denote 

 a marked difference in size of the ultimate segments of the sterile 

 fronds. 



The genus is characterized by a distinct contrast between barren 

 and fertile pinnae, by the resemblance of the pinnules to those of 

 Anemia adiantifolia, Sw., and by the correspondence in habit of 

 sterile and fertile pinnae to that species. 



Ruffordia is placed in the ScMzacece, but, in the absence of very 

 satisfactory proof, with the addition of a query expressive of the 

 imperfect evidence. 



The adoption of this name is to place on record the enthusiasm 

 and careful work of Mr. Rufford, to whose labours we are indebted 

 for the material on which the genus has been founded. 



1. Ruffordia Gopperti (Dunk.). 



1833. Sphenopteris Phillipsii, Mantell, Geol. S.E. England, p. 239, fig. 2. 

 1844. Cheilanthltes Gopperti, Dunker, Progr. p. 6. 



1846. Sphenopteris Gopperti, Dunker, Wealdenbildung, p. 4, pi. i. fig. 6, 

 pi. ix. figs. 1-3. 



Sphenopteris Hartlebeni, Dunker, loc. cit. p. 4, pi. ix. fig. 9. 



Sphenopteris longifolia, Dunker, loc. cit. p. 4, pi. viii. fig. 6. 



1848. Sphenopteris Gopperti, Bronn, Index pal. nomencl. vol. ii. p. 1168. 

 Sphenopteris Hartlebeni, Bronn, ibid. p. 1168. 



1849. Sphenopteris Gopperti, Brongniart, Tableau, p. 107. 



1860. Sphenopteris Gopperti, Unger, Gen. spec, plant, foss. p. 109. 



1851. Sphenopteris adiantifrons, Ettingshausen, Jahrb. k.-k. geol. Reichs. 



Jahrg. ii. No. 2, p. 156. 



1852. Sphenopteris Jugleri, Ettingshausen, Abh. k.-k. geol. Reichs. Band i. 



Abth. iii. No. 2, pi. iv. fig. 5. 



1 Quart. Journ. Geol. Soc. vol. xxii. 1866, p. 153. 



2 Trait, pal. veg. vol. iii. p. 489. 



