788 MR ROBERT KIDSTON ON THE FOSSIL PLANTS OF 



Neuropteris gigantea, Sternb. 



Neuropteris gigantea, Sternb. See ante, p. 775. 



Localities B, F. 



Equisetacese. 



Calamites, Suckow. 



Group I. — Calamitina, Weiss. 



Calamites (Calamitina) undulatus, Sternb. 



Calamites (Calamitina) undulatus, Sternb. See ante, p. 776. 

 Locality D. 



Calamites (Calamitina) Schtitzei, Stur. 



1881. Calamites Schutzei, Stur, Zur Morph. d. Calamarien, p. 8 (Sitzb. d. I: AJcad. d. Wissensch., vol. 

 lxxxiii., i. Abth., 1881, p. 416), pi. i. fig. 1. 



1887. Calamites Schutzei, Stur, Calamarien d. Carbon-Flora d. Schatz. Schicht. (K. k. geol. Reichs. 



Abhandl., vol. xi. Abth. ii., Wien), p. 131, pi. iii. figs. 2, 2b, pi. iv., pi. iv.b fig. 1, pi. xvii. fig. 

 2, text figs. 33-38. 



1888. Calamites Schutzei, Zeiller, Flore foss. bassin houil. d. Valen., p. 350, pi. Iv. fig. 4. 



1884. Calamites (Calamitina) varians, cf. Schutzei, Weiss, Steinltohl. Calamarien, part ii. p. 79, pi. xxi. 



fig. 5, p. 80, pi. xxvii. fig. 2. 

 1825. (?) Calamites approximatus, Artis (non Schloth.), AntedU. Phyt., pi. iv. 

 1828. (?) Calamites approximates, Brongt. (pars) (non Schloth.), Hist. d. veget. foss., p. 133, pi. xv. 



figs. 7-8, pi. xxiv. fig. 1. 

 1833. (?) Calamites approximates, L. and H., Fossil Flora, vol. i., pi. lxxvii. 

 1887. (?) Calamites approximates Stur, (pars), Calamarien d. Carbon.- Flora d Schatz. Schicht., p. 119, 



pi. viii. figs. 2-3, pi. xii. fig. 7; 



Remarks. — Zeiller has clearly pointed out that the Catamite figured by several 

 writers under the name of Calamites approximatus cannot be Schlotjieim's plant which 

 was described as being somewhat similar to his Calamites cannseformis, but with longer 

 joints and narrower ribs.* What Calamites cannseformis really is is equally uncertain, 

 but it is clear that the short jointed Calamite pith cast, which has so often been 

 figured as Calamites approximatus, cannot be the described but unfigured plant to 

 which Schlotheim applied the name. Zeiller thinks that the true Calamites approxi- 

 matus, Schloth., may be identical with Brongniart's Calamites Cistii, but this cannot 

 be satisfactorily determined. 



There seems, therefore, no other course open than to let the name of Calamites 

 approximatus, Schlotheim {non Artis and Brongt.), disappear from our lists, and slip 

 into oblivion. 



The question next arises, — To which species are the various specimens which have 



* Zeiller, Flore foss. bassin houil. d. Valen., p. 352. 



