48 Annals of the South African Museum. 



II.— DESCKIPTION OF SPECIMENS. 



Group EQUISETALES. 



Genus SCHIZONEUEA Schimper and Mougeot. 



SCHIZONEUEA KRASSEEI Sp. nOV. 



[Probably identical with Schizoneura carrcrei Zeiller.]" 

 Plate IX., figs. 5, 6. 



1900. ? Schizoneura 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 

 Schizoneura krasseri. 



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 t from the Stormberg beds shows broader 

 and more prominent ridges than the specimens represented in 

 figs. 5 and 6. The Scanian Ehaetic species ScJiizoneura Jioerensis 

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

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

 as Phyllotheca inclica Bunb. is also very similar to the examples shown 

 in figs. 5 and G.]] Specimens which may well be identical with the 

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

 setaceous stems probably referable to Schizoneura,*^ and by Schenk 

 as Schizoneura sp.** from Ehaetic rocks of Persia. Some of Feist- 



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



t Feistmantel (89), pi. iii., fig. 9. 



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



§ Zeiller (82), pi. x., fig. 1. 



II See note. p. 75. 



11 Krasser (00), pi. iii., figs. l-3«. 



*• Schenk (87), pi. viii., figs. 4C, 48. 



