494 PTERIDOSPEEMS, ETC. [CH. 



A broader form of frond with similar venation was described 

 by Lindley and Hutton^ as Taeniopteris major. An examination 

 of the type-specimen from the Inferior Oolite of Yorkshire, now 

 in the Manchester Museum, led me to doubt the necessity of 

 specific separation from T. vittata^- 



A smaller frond of the same general type as T. vittata is 

 recorded from Wealden strata of North Germany and England 

 under the name T. Beyrichii ^. 



Weichselia. 

 This generic name was instituted by Stiehler * for impres- 

 sions of bipinnate sterile fronds, presumably ferns, from 

 Lower Cretaceous rocks near Quedlinburg. The same type of 

 leaf from English Wealden beds had previously been referred 

 by Mantell and other authors to Pecopteris, and by Brongniart 

 to his genus Lonchopteris'. It is, however, advisable to follow 

 Nathorst's example" and restrict the latter name to Palaeozoic 

 species. As already suggested, it would obviate confusion to 

 substitute a new generic designation for Lonchopteris in the 

 case of Triassic species which are probably members of the 

 Osmundaceae. The type-species of Stiehler, Weichselia Ludo- 

 wicae'^, does not differ in any important character from 

 Weichselia Mantelli, the species originally described by Stokes 

 and Webb from the Wealden of England as Pecopteris 

 reticulata. 



Weichselia Mantelli (Brongn.)*. Fig. 333. 



1824. Pecopteris reticulata, Stokes and Webb, Trans. Geol. Soc. [2]. 



Vol. I. p. 423, Pis. XLVI. XLVII. 



1828. Lonchopteris Mantelli, Brongniart, Prod. p. 6 ; Hist. v^g. foss. 



p. 369, PI. cxxxi. 

 1894. Weichselia Mantelli, Seward, Wealden Flora, Vol. i. p. 114. 



PI. X. fig. 3. 

 1899. Weichselia reticulata, Fontaine, in Ward, Ann. Rep. U. S. 



Geol. Surv. p. 651. 



1 Lindley and Hutton (33J A. PI. xcii. 



2 Seward (00) p. 14. ^ Schenk (71) PI. xxix. ; Seward (94^) A. p. 125. 

 4 Stiehler (58) Pis. xn. xiii. ^ gge p. 576. e Nathorst (90). 



' For figures, see Stiehler loc. cit. and Hosius and Von der Marok (80) 



Pis. XLIII. XIilV. 



8 For synonymy, see Fontaine, in Ward (99) p. 651 ; Seward (94'') A. p. 114 ; 

 Seward (00) p. 20. 



