Report on the Diatoms of the Albatross Voyages in the Pacific Ocean, L888-1904

Report on the Diatoms of the Albatross Voyages in the Pacific Ocean, L888-1904

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...129. pi. 9. f. 18. 1880. H. D. Smith, Sp. Diat. Typ. no. 650. 1874. Grun. in Fenzl, Reise Novara Bot. 1: 5. 1870. Rabh. Fl. Eur. Alg, 1: 3, 25./. 78. 1864. Van Heur. Treat. Diat. 353. 1896. Lagers. Bih. Sv. Vet. Akad. Handl. ll4: 20. 1873. De Toni, Syll. Alg. 2: 742. 1892. Diatoma (DC.)-Heib. in part; Lyng. Hydro. Dan. 180. pi. 62A. 1819. Fraguaria Lyng. in part; Lyng. Hydro. Dan. 182. pi. 62. E-F. 1819. Striatella C. Ag. in part; Ralfs, Ann. Mag. Nat. Hist. 1843. 11: 457. pi. 9. f. 5. 1843. There is great need of a capable monograph of this genus. Van Heurck's Synopsis gives two plates illustrating thirty species. Smith's British Diatoms illustrates superbly four species. Single species are scattered here and there through diatom literature. But the available figures are as a class poor and scanty. Owing to the delicate markings that characterize this genus, the earlier investigators, like Lyngbye, Agardh, and Ehrenberg, confused the species to an extreme extent. It is impossible to look upon Greville's genus Diatomella as anything more, than a normally distinct species of Grammatophora. The main mark of distinction relied upon for separation, namely, the single straight septa as seen in zonal view, is neither confined to this species nor important enough, were it peculiar to it, to form a basis for a separate genus. Thus varieties of 67. undulata Ehrenb., G. arctica Cleve, and G. stricta Ehrenb.a show the same quality. This characteristic, together with the extreme minuteness and delicacy of this form, mark it as a sharply distinct species, nothing more. Were, however, its generic status valid, it would necessarily take Ehrenberg's older name, Disiphonia, instead of that of Greville. Grammatophora flexuosa Grun.; Van Heur. Synop. pi. 53bis. f....show more

Product details

  • Paperback | 116 pages
  • 189 x 246 x 6mm | 222g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236603117
  • 9781236603111