202 
Calamites approximatus. 
Pars 5 
1828 approximatus Bgt., Prodrome, p. 38. 
1833 approximatus L. et H., Fossil Flora, I, p. 213, t. 77. 
1835 approximatus Gutbier, Zwickau, p. 23, t. 2, f. 3, 3a. 
1837 approximatus L. et II., Fossil Flora, III, p. 171, t. 216. 
1841 approximatus Petzholdt, Ueber Calamiten und Steinkohlenbildung, 
p. 66, t. 6, f. 7. 
1843 approximatus Gutbier, Gaea v. Sachsen, p. 69. 
1844 approximatus Mantell, Medals of creation, p. 110, f. 8, No. 3. 
1845 approximatus IJnger, Synopsis, p. 22. 
1847 approximatus Bunbury, Q. J. G. S. London, III, p. 433. 
1848 approximatus Goeppert, in Bronn, Index palaeontol., p. 198. 
1848 approximatus Sauveur, Belgique, Acad. roy. des scienc., des lettr. 
et des beaux-arts de Belgique, t. 2. 
1850 approximatus Mantell, Pictorial Atlas, t. 16. 
1850 approximatus Finger, Gen. et spec., p. 48. 
1850 approximatus Andrae, Jahrb. d. Naturw. Vereines Halle, p. 119. 
1851 approximatus Ettingshausen, Haidinger’s Naturw. Abh., IV, 1, p. 79. 
1855 approximatus Geinitz, Sachsen, p. 7, t. 11, f. 1—5; t. 12, f. 1—3. 
1868 approximatus Roehl, Westfalen, Palaeontogr., XVIII, p. 14, 
t. 2, f. 7. 
1869 approximatus Schimper, Traite, I, p. 314, t. 18, f. 1, 2, 3; 
(non t. 19, f. 1). 
1872 approximatus Bgt. mit Huttonia arborescens Feistmantel, Frucht¬ 
stadien, Abh. k. Böhm. Ges. d. Wissensch., (6), V, p. 13, t. 3. 
1873 approximatus Feistmantel, Zeitschr. d. Deutsch. Geol. Ges., XXV, 
p. 594, 597. 
1874 approximatus Feistmantel, Steink. u. Perm-Ablag. N. W. von 
Prag, Abh. k. Böhm. Ges. d. Wissensch., (6), VI, p. 67. 
1874 approximatus Feistmantel, Böhmen, Palaeontogr., XXIII, p. 106, 
t. 6, f. 2, 3; t. 7, f. 1, 2. 
1876 approximatus Roemer, Lethaea palaeoz., Atlas, t. 50, f. 3. 
1876 approximatus Boulay, Terr. houill. du Nord de la France, p. 21. 
1876 approximatus Heer, Flora foss. Helvetiae, p. 46, t. 20, f. 5. 
1877 approximatus Stur, Culmflora, II, Abh. k. k. geol. Reichsanstalt, 
Wien, VIII, 2, p. 98, t. 4, f. 8. 
1879 approximatus Lesquereux, Coalflora, I, Atlas, t, 1, f. 5; Text, 
1880, p. 26. 
1881 cf. approximatus Stur, Zur Morpholog. der Calam., Sitzungsber. 
d. k. Acad. d. Wiss., Wien, Math, naturw. CI.. LXXXIII, 1. Abt., 
p. 458, f. 13, 14. 
1883 approximatus Achepohl, Niederrh. Westf. Steink., Ergänz.- 
Bl. II, f. 11. 
1884 approximatus Lesquereux, 13th Ann. Rept. IndianaDept. of Geology 
and Natural History, II, p. 40, t. 5, f. 6. 
1884 approximatus Weiss, Steink. Calam., II, Abh. z. geol. Specialk. 
von Preußen, V, 2, p. 81, t. 25, f. 1. 
1887 approximatus (und C. waldenburgensis) Stur, Calamar. Schatzl. 
Schicht., Abh. k. k. Geol. Reichsanst., Wien, XI, 2, p. 119, t. 5, 
f. 2, 3; t. 8, f. 2, 3, 4; t. 12, f. 7. 
1887 cf. approximatus Stur, Calam. Schatzl. Schichten, 1. c., p. 37, 
Textfig. 16, 17. 
1888 cf. approximatus Toula, Die Steinkohlen, t. 5, f. 6. 
1897 typ. approximatus Potonie, Lehrbuch, p. 191, f. 187. 
1898 approximatus Seward, Fossil plants, I, p. 370, f. 100. 
1899 approximatus Hofmann et Ryba, Leitpflanzen, p. 24, t. 1, f. 5. 
1903 approximatus Arber, Q. J. G. S., London, LIX, p. 5, t. 1, f. 3. 
1906 approximatus Zeiller, Blanzy et Creusot, p. 130. 
1908 approximatus Renier, Möthodes, p. 41, f. 15. 
1909 approximatus Arber, Fossil plants, p. 74, t. auf p. 53. 
