2 Mededeelingen van ’s Rijks Herbarium Leiden: 
MANS, Monograph of the Calamites of Western Europe (Mededeel. Rijks 
Opsporing van Delfstoflen, NO. 7, 1915) and especially in: Fossilium 
_ 
Catalogus, II, Pars 5, JoNGMANs, Calamites, 1915. 
C. abnormus Achepohl, Niederrh. Westph. Steink., Lief. III, 1883, 
p: 134, ta 40, feld 12 Indeterminable. 
C. acuticostatus Weiss, 1876, Steink. Calam., IT, Pl. 19, fig. 2; JoNG- 
MANS, Anleitung, [, 1911, fig. 152, 152a. 
C. undulatus Sternb. 
C. aequalis Sternberg, Versuch, IL, 5, 6, 1833, p. 49. 
C. suckowi Bgt. 
C. affinis Gutbier, Zwickau, 1835, p. 27, Pl. 2, fig. 11, Ma. 
Indeterminable. 
C. alternans Germar et Kaulfuss, Act. Ac. Leop. Nat. Cur., XV, 2, 
182857 pr 224 PLE Gb he: Indeterminable. 
C. alternans Germar, in Isis, 1838, Pl. 3, fig. 1. 
? C. undulatus Bgt. 
C. alternans Stur, 1881, Sitz. Ber. Akad. Wiss., Wien, LXXXIII, 
ál en DE C. schützeiformis typicus K. et J. 
C. alternans Stur, Abh. k. k. Geol. Reichsanst., Wien, XI, 2, 1887, 
pi41, PLAT, ofigde t Asterophyllites equisetiformis Schl. 
C. ambiguus Eichwald, Geogn. Palaeont. Bemerk. über Halbinsel 
Mangischlak und Aleutischen Inseln, St. Petersburg, 1871, p. 114, 
Pladsabond: Indeterminable. 
C. (Aspasia) amplectens Stefani, Flore carb. e perm. della Toscana, 
1901, p-75, PEA, gel, 2) 3d Indeterminable. 
C. anceps Grand Eury, Loire, 1877, p. 23, PL. 3, fig. 4. 
Indeterminable. 
C. anomalis Achepohl, Niederrh. Westph. Steink., Lief. III, 1883, 
p. 134, Pl. 40, fig. 413. Indeterminable. 
C. (Calamodendron) antiguus Dawson, Geol. Survey Canada, 1871, 
p. 24, Pl. 3, fig. 39. Indeterminable. 
C. (Egwisetum) antiquus Bureau, Compt. Rend. Ac. des Sc., Paris, 
C, p. 73. No figure. ? Calamariaceae. 
C. approximatus Schlotheim, Petrefactenkunde, 1820, p. 399. 
Indeterminable. 
C. approximatus Artis, 1825, Antedil. Phytol., PL. 4. 
C. schützeiformis typicus K. et J. 
C. approximatus Bget., Histoire, 1, 1828, PL. 15, fig. 7, 8 (copied 
from ARTIS). C. schützeiformis typicus K. et J. 
