Par.-? 9 
Equisetum arcticum — Equisetum arenaceum. 
539 
1876 arcticum Heer, Fl. foss. arct., IV, 1, K. Sv. Vetensk. Akad. Haadl., 
XIV, 5, p. 57. 
1878 arcticum Heer, Fl. foss. arct., V, 1, p. 19, t. 1, f. Ta. 
1886 arcticum Dawson, Trans. Roy. Soc. Canada, IV, 4, p. 22. 
1902 arcticum Penhallow, Trans. Roy. Soc. Canada, VIII, 4, p. 46. 
1908 arcticum Penhallow, Report on tert. plants of British Columbia. 
Canada Dept. of mines, Geol. Survey Brauch, p. 53. 
1909 arcticum Dowling, The Coalfields of Manitoba etc., Canada Dept. 
of Mines, Geol. Surv. Branch, Xo. 1035, p. 31. 
B e m e r k nngen: 
Heer, 1870, vergleicht die Pflanze mit E. limosum L. 
Vorkommen: 
Miocän: Spitzbergen: Kap Lyell, Scott Gletscher; Kingsbay. 
Tertiär: Grinnelland; Lignit von Porcupine Creek und Great 
Valley (Dawson); Paskapoo und Laramie, Canada (Dowling). 
.Eocän, Canada, Red Deer River. 
Equisetum arenaceum Jaeger. 
1865 arenaceum Heer, Urw. d. Schweiz, p. 49, f. 27a—h. 
1869 arenaceum Schimper, Traite, I, p. 270, t. 9, f. 1—3, 10, 11. 
1872 arenaceum Heer, Le monde primitif, p. 60, f. 27a—h. 
1873 arenaceum Saporta, Plantes jurass., I, p. 228, t. 26, f. 1, 2. 
1874 arenaceum Compter, Xov. Act. Ac. Caes. Leop. Car. Xat. Cur., 
XXXVII, 3, p. 5. 
1876 arenaceum Heer, The primaeval world, I, p. 50, f. 27a—h. 
1876 arenaceum Heer, Flora foss. Helvetiae, p. 74, t. 26, f. 1—3; t. 27, 
f. 1—5; t. 28; p. 90, t. 33, f. 6; t. 38, f. 10, 11. 
1879 ärenaceum Heer, Urwelt, Ed. II, p. 57, f. 45a—h; t. 2, f. 10; t. 3, f. 4. 
1880 arenaceum Romanowski, Materialien zur Geologie von Turkestan, 
Lief. I, p. 126, t. 23, f. 1, 2. 
1880 arenaceum Schimper-Schenk, in Zittel, Handbuch Palaeophyto- 
logie, Lief. 2, p. 162, f. 123, Xo. 4. 
1882 arenaceum Renault, Cours, II, p. 153, t. 23, f. 9. 
1885 arenaceum Stur, Sitzungsber. K. Akad. d. Wiss., Wien, Math. 
Xatw. CI., XCI, p. 98. 
1889 arenaceum Schenk, Ber. über die Verh. d. Kgl. Sachs. Ges. d. 
Wiss., Math. Phys.^Cl., XLI, p. 5, t. 1, f. 5, 6. 
1890 cf. arenaceum Romanowski, Materialien zur Geologie von Turke¬ 
stan, Lief. III, p. 127, t. 48, f. 2; t. 19, f. 2. 
1896 arenaceum Sordelli, Flora fossilis insubrica, p. 44, t. 8, f. 7—9. 
1903 arenaceum Fritel, Paleobotanique, p. 67, f. 43. 
1913 arenaceum Lignier, V6g. foss. Xormandie, VIT, M6m. Soc. Linn. 
Xormandie, XXIV,- p. 76, t. 9, f. 12. 
1827 Calamites arenaceus major Jaeger, Pflanzenverst. Bausandstein 
Stuttgart, p. 37, (p. 7, 10), t. 1, f. 1—45; t. 2, f. 1— 7. 
1827 Calainites arenaceus minor Jaeger, Pflanzenverst. Bausandstein 
Stuttgart, p. 37, (p. 14), t. 3, f. 1—7; t. 4, f. 1—7, 9; t. 5, f. 1, 2, 3; 
t. 6, f. 1—7. 
1828 Calainites arenaceus Bgt., Histoire, I, Livr. 2, t. 23, f. 1; t. 25, 
f. 1; t. 26, f. 3—5; Text, Livr. 3, 1829, p. 138. 
1833 Calamites arenaceus Sternberg, Versuch, II, Fase. 5, 6, p. 47. 
1845 Calamites arenaceus Unger, Synopsis, p. 24. 
1873 Calamites arenaceus Sordelli, Descriz. avanzi veget. d. argill. 
plioc., Atti d. Soc. ital. Sc. nat., 1873, p. 115. 
1864 Equjsetites arenaceus Schenk, Beiträge zur Flora des Keupers usw., 
VII. Bericht naturf. Ges. zu Bamberg, p. 9, t. 7, f. 2. 
