48 A)i)ials of the South African Museum. 



II.— DESCKIPTION OF SPECIMENS. 



Geoup equisetales. 



Genus SCHIZONEURA Schimper and Mougeot. 



SCHIZONEURA KBASSERI Sp. nOV. 



[Probably identical with Schizoneiira carrcrei Zeiller.]" 

 Plate IX., figs. 5, 6. 



1900. ? Scliizonenra sp. Krasser, Denksch. K. Akad. Wiss. Wien, 

 Bd. LXX., p. 146, pi. iii., figs. l-3a. 



Stems broad ; internodes long, reaching a length of over 20 cm., 

 the internodal ridges crowded, pursuing either a straight course 

 across the node or occasionally alternating. Nodes shown as slight 

 depressions with indications of small leaf-trace protuberances. 



Although it is impossible to give a satisfactory diagnosis of the 

 Stormberg Equisetaceous stems, I have ventured, for the sake of 

 convenience, to append a specific name, and in view of the probable 

 identity of the African plant with that described by my friend Dr. 

 Fridolin Krasser from China, I have designated the Stormberg type 

 Scliizoneura krasscri. 



The fragments of broad Equisetaceous stems are too small and 

 imperfect to admit of a complete diagnosis : they are characterised 

 by the numerous internodal ridges which often pursue a straight 

 course across the nodal region and by their long internodes, which 

 reached a length of at least 7 cm. The small piece of ribbed stem 

 figured by Feistmantel f from the Stormberg beds shows broader 

 and more prominent ridges than the specimens represented in 

 figs. 5 and 6. The Scanian Ehaetic species Schizoneura hoerensis 

 His. I resembles the figured specimens in the narrow and numerous 

 ribs, and a piece of broad stem described by Zeiller § from Tonking 

 as Phyllothcca indica Bunb. is also very similar to the examples shown 

 in figs. 5 and 6.|| Specimens which may well be identical with the 

 South African species are figured by Krasser from China as Equi- 

 setaceous stems probably referable to Scliizone^ira,*\\ and by Schenk 

 .as Schizoneura sp. '■'•'' from Rhsetic rocks of Persia. Some of Feist- 



* Zeiller (02=), pis. xxxvii. , xxxviii. 

 t Feistmantel (H9), pi. iii., fig. 9. 



+ Nathorst (78), pi. x., figs. G-8. See also Nathorst (78), pi. i., figs. 1-4. 

 § Zeiller (82), pi. x., fig. 1. 

 II See note. p. 75. 

 1i Krasser (00), pi. iii., figs. l-3rt. 

 *• Schenk (87), pi. viii., figs. 46, 48. 



