IX] 



EQUISETITES PLATYODON. 



267 



described and figured by Lindley and Huttoni as Hippurites 

 gigavtea, and now usually spoken of as Galamitina, should be 

 named Eqidsetites. It would probably be better to adopt the 

 name Calamitincf^for the French species. The type-specimen 

 of this species is in the Natural History Museum, Paris. 



Fig. 59. Equisetites platyodon Bioiigii. (After Schoenlein, slightly reduced.) 



When we pass from the Peimian to the Triassic period, we 

 find large casts of very modern-looking Equisetaceous stems 

 which must clearly be referred to the genus Eqidsetites. The 

 portion of a stem represented in fig. 59 known as Eqidsetites 

 platyodon Brongn.^ affords an example of a Triassic Equi- 

 seta(;eous stem with a clearly preserved leaf-sheath. The 

 stem measures about 6 cm. in diameter. One of the oldest 

 known Triassic species is Eqidsetites Moageoti^ (Brongn.) from 

 the Bunter series of the Vosges. 



^ Lindley and Hutton (31) 1*1. cxiv. 



2 Schoenlein and Schenk (65) PI. v. fig. 1. 



^ Hchimper and Mougeot (44) p. 68. PI. xxrx. 



