76 RUFFORDIA. 
which showed fertile pinnz but no sporangial structure; he 
compared the sterile pinnules to those of Anemia adiantifolia, 
Sw., from Cuba.’ Schimper? does not admit the correctness of 
Dawson’s determination ; and, indeed, an inspection of the figures 
of Cyclopteris (Aneimites) Acadica, Dawson, does not lead one 
to accept the specimens as evidence for the existence of the 
Schizacee@ in pre-Carboniferous times. 
The plants included under /uffordia 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 pinnee, by the resemblance of the pinnules to those of 
Anemia adiantifolia, Sw., and by the correspondence in habit of 
sterile and fertile pinne to that species. 
uffordia is placed in the Schizacee, 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. 8.K. England, p. 239, fig. 2. 
1844. Cheilanthites Gopperti, Dunker, Progr. p. 6. 
1846. Sphenopteris Gépperti, Dunker, Wealdenbildung, p. 4, pl. i. fig. 6, 
pl. ix. figs. 1-3. 
Sphenopteris Hartlebeni, Dunker, loc. cit. p. 4, pl. ix. fig. 9. 
Sphenopteris longifolia, Dunker, loc. cit. p. 4, pl. viii. fig. 6. 
1848. Sphenopteris Gépperti, Bronn, Index pal. nomencl. vol. ii. p. 1168. 
Sphenopteris Hartlebeni, Bronn, ibid. p. 1168. 
1849. Sphenopteris Gopperti, Brongniart, Tableau, p. 107. 
1850. 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, pl. iv. fig. 5. 
1 Quart. Journ. Geol. Soc. vol. xxii. 1866, p. 153. 
2 Trait. pal. vég. vol. iii. p. 489. 
