126 T^NIOPTEEIS. 



I have slightly modified the original diagnosis in one or two 

 particulars. 



Schenk points out that his species is readily distinguished from 

 others by the form of the leaf. There is, however, a fairly close 

 agreement between T. Beyrichii, Schenk, and some specimens of 

 T. tenuinervis, Brauns ; ' also T. stenoneura, Schenk, as figured 

 by Saporta,'' and Tigniopteris {Stangerites) spatulata (McClelland).' 



It is extremely difficult to separate many of the forms of 

 Taniopteris described by various writers from different geological 

 horizons. 



In 1882 Peyton recorded the discovery by Mr. Dawson of a 

 specimen which he referred to Sohenk's species, in the "Wadhurst 

 clay near Hastings. Other specimens were afterwards found by 

 Peyton himseK, who speaks of a slight divergence of the Hastings 

 specimens from Schenk's figured type. He describes the midrib 

 . as "herring-boned" ; this I regard as descriptive of the branching 

 outwards of the lateral veins. 



V. 2381. PI. IX. Eigs. 3 and 3a. 



This specimen agrees very closely with Schenk's figure, pl. 

 xxix. fig. 7,* except that in his specimen the lateral veins are 

 rather closer together. 



Cf. T. (Oleandridium) ohtusa, ITath.," from the Bjuf plant beds, 

 pl. viii. figs. 7, 9, 10, and 13. It seems almost impossible to 

 separate such a specimen as Fig. 10, Pl. VIII. from T. Beyrichii. 

 Ecclesbourne. Rufford Coll. 



v. 2172. Smaller specimen, 4 cm. long, 4 mm. broad ; indented 

 apex. Practically identical with Schenk's figure. Ecclesbourne. 



Rufford Coll. 



V. 2177. Small fragments of the same species. Ecclesbourne. 



Rufford Coll. 



52942f;. Venation not preserved. Possibly a fragment of T. 

 Beyrichii, Schenk. Presented ly J. E. S. Peyton, Esq., 1886. 



1 Brauns, PalseontograpHca, vol. ix. p. 50, pl. xiii. figs. 1-3. 



^ Pal. rran9. vol. i. p. 443, pl. Ixii. figs. 2 and 3. 



■'" Foss. Fl. Gond. vol. i. pt. i. p. 34, pl. vi. figs. 1-7. 



* Palseontographica, vol xix. 



6 Sver. Geol. Undersokn. 4to. Flor. Bjuf, 1878. 



