430 Wisconsin Academy of Sciences , Arts, and Letters. 
Kufferath, 1912, p. 321. Griffith, 1912, p. 11. Borge, 1913, p. 60. 
Brunnthaler, 1913, pp. 165, 170; Fig. 1. Chodat, 1913, p. 26; 
Figs. 1-11, 22. Fritsch and Rich, 1913, p. 43. Hardy, 1913, p. 93. 
Krmpotic, 1913, p. 27. Migula, (no date) p. 37; PI. IV, Fig. 7. 
Achnanthes obliqua. Turpin, 1820, Fig. 9. Turpin, 1828, p. 
312; Pi. XIII, Fig. 9. 
S. acutus. Meyen, 1829, p. 775; PI. XLIII, Fig. 32. Klitzing, 
1833, p. 609. de Brebisson, 1839, p. 271. Meneghini, 1840, p. 
207. Klitzing, 1843, p. 164. HassalL 1845, p. 393; PI. XCII, 
Fig. 14. Ralfs, 1845, p. 403; PI. XII, Fig. 6. Ralfs, 1846, p. 160; 
PL XV, Fig. 6. Ralfs, 1848, p. 191; PI. XXXI, Figs. 14, 16. 
Bailey, 1851, p. 29. Zanardini, 1857, p. 250. Archer, 1858, p. 258. 
Grunow, 1858, p. 499. Reinsch, 1867, p. 82. Rabenhorst, 1868, 
p. 64; Figs. 34A-34G. Wood, 1869, p. 135. Hohenbuhel-Heufler, 
1871, p. 318. Wittrock, 1872, p. 31. Archer, 1874, p. 329. Wood, 
1874, p. 90. Reinsch, 1876. Kirchner, 1878, p. 98. Wille, 1879, 
p. 30. Gienowsky, 1881, p. 304. Wolle, 1881, p. 213. Cooke, 
1882, p. 33. Nordstedt, 1882, p. 46. Hansgirg, 1883, p. 288. 
Hansgirg, 1884B, p. 365. Artari, 1884, p. 132. Cooke, 1885. 
Paque, 1885, p. 52. de Wildemann, 1885, p. 123. Bennett, 1886, 
p. 3. Campbell, 1886, p. 93. Parfitt, 1886, p. 392. de Toni et 
Levi, 1886, p. 67. Beck, 1887, p. 274. Bennett, 1887, p. 9. de 
Toni et Levi, 1887, p. 1585. Wolle, 1887, p. 173; PI. CLVI, Figs. 
25-26. Alexenko, 1888, p. 158. Balsamo, 1888, p. 40. W. West, 
1888, p. 748. Heiden, 1889, p. 5. MacKenzie, 1889, p. 271. 
Riabinine, 1889A, p. 302. Riabinine, 1889B, p. 47. W. West, 
1889A, p. 290. W. West, 1889B, p. 206. W. West, 1889C, p. 88. 
Bennett, 1890, p. 2. Chmielweski, 1890, p. 92. Roy, 1890, p. 
338. W. West, 1890, p. 298. de Wildemann, 1890A, p. 137. 
de Wildemann, 1890B, p. 155. Alexenko, 1891, p. 61. Beyerinck, 
1891, p. 279. Ianouchkievitch, 1891, p. 290. W. West, 1891A, 
p. 248. Bennett, 1892, p. 5. Franze, 1892, p. 154; PI. Ill, Figs. 
1-3. Turner, 1892, p. 161. Weiss, 1892, p. 37. W. West, 1892A, 
p. 194. W. West, 1892B, p. 738. Beyerinck, 1893, p. 368. Chodat 
et Malinesco, 1893, p. 184. Franze, 1893, p. 286. Stokes, 1893, p. 
52. Alexenko, 1894, p. 72. Borge, 1894, p. 9. Alexenko, 1895, 
p. 92. Borge, 1895, p. 6. Bohlin, 1897, p. 24. Chodat, 1897, 
p. 291. Chodat, 1898, pp. 166, 179. Nitardy, 1898, p. 104. 
Zacharias, 1898, p. 93. Iwanoff, 1899, p. 380. Senn, 1899, p. 70. 
Balsamo, 1900, p. 266. Chodat et Grintzesco, 1900, p. 387. 
Lindau, 1901, p. 136. Bohlin, 1902, p. 44. Fritsch, 1902, p. 582. 
Larder, 1902, p. 59. Voigt, 1902, p. 76. Fritsch, 1903, pp. 640, 
643, 646. Snow, 1903, p. 391. W. West, 1903, p. 100. Zacharias, 
1903B, pp. 254, 263. Comere, 1904, p. 62. Heering und Homfeld, 
1904, p. 83. Marquand, 1904, p. 269. Moreto, 1904, p. 440. 
Nitardy, 1904, p. 318. Andersson, 1890, p. 5. Suhr, 1905, p. 
252. Fritsch, 1906, p. 205. Tanner-Fullmann, 1907, p. 232. 
Adams, 1908, p. 35. Bachmann, 1908, p. 44. Quelle, 1908, p. 
43. Viret, 1908, p. 977. Andrews, 1909, p. 379. Chodat, 1909, 
