32 EQUISETITES. 



is of a doubtful nature, there is not sufficient evidence to warrant 

 the transference of this species to another genus at the present time. 



This genus and species is known in the rocks of Gondwanaland 

 only from the earliest Glossopteris-be&rmg beds in New South 

 Wales at Greta and Anvil Creek, which are possibly equivalent 

 to the Coal-measures of Europe. The genus is an abundant type 

 of Calamitean foliage in the Northern Hemisphere in rocks of 

 Upper Carboniferous and Permian age. 



Not represented in the British Museum collection. 



Genus EQUISETITES, Sternberg, 1833. 



[Flora Vorwelt, Heft v, vi, p. 43.] 



Equisetites is a somewhat unsatisfactory genus, including plants 

 chiefly, but not entirely, of Mesozoic age, which closely resemble 

 in habit the recent genus JEquisetum, the Horsetails. It is almost 

 impossible to distinguish clearly between the leaf-sheaths of 

 Equisetites and such genera as Annularia and Phylhtheca. The 

 chief foliage character is that the leaf-sheaths are large and 

 prominent, and the free segments comparatively small. In many 

 of the Mesozoic species, the sheath and the free leaves are closely 

 appressed to the stem, and not spreading as in most Phyllothecas. 



[Equisetites ? ] ' Morenianus, Kurtz. 



1894. Equisetites Morenianus, Kurtz, Rev. Mus. La Plata, vol. vi, p. 129, 



pi. iii, fig. 1. 



1895. E. Morenianus, Bodeubender, Rev. Mus. La Plata, vol. vii, table 



opposite p. 148. 



1896. E. Morenianus, Bodenbender, Zeitschr. deutscb. geol. Gesell., vol. xlviii, 



table opposite p. 772. 



Type. La Plata Museum, Argentina. 



Kurtz describes this species as follows : — Caule articulato, 

 ramoso, striato, striis paucis fortioribus tenuioribus intermixtis 

 notato ; articulis subaequalibus, 1'5— 1*7 cm. longis, 5-6 mm. latis; 

 vaginis ramorum longe denticulatis, dentibus acutis. 



The fragment figured by Kurtz is about 4 cm. long, and consists 

 of a branched axis. The branch bears what are apparently leaves 



1 See footnote, p. 30. 



