Mine Water Composition an Index to the Course of Ore Bearing Currents

Mine Water Composition an Index to the Course of Ore Bearing Currents

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...62. S. IRREGULARIS Nageli in Kiitzing, 1849, p. 440; 1855a, p. 7, Pl. XXII, fig. 11. Pale or dirty green, little lubricous; vegetative cells cylindrical, 32-36 p. diam., 3%-7 diam. long; dissepiments plane; fertile cells scarcely swollen; chromatophores 2-3, very slender, with large, nodulose, distant pyrenoids, making three-fourths to one turn in a cell; spores 32-36 p. diam., 1%-2 diam. long. Charleston, Ill., Transeau. Europe. Spirogyra gzlqanlica Grace A. Hill, 1916, p. 198, is founded on a sterile plant resembling S. crassa, but with somewhat larger filaments, 173-188 11. against 150-160; chromatophores making more turns to the cell; pyrenoids somewhat larger. The dimensions of S. crassa are probably taken from Collins, 1909, p. 113, but Miss Hill apparently overlooked p. 105 of the same paper. " Specific distinctions not always clear, based on the character of the dissepiments, the number and breadth of the chromatophores, the size and form of the spore, the character of its median membrane, the inflation of the fertile cell, and, too often, the dimensions of the filaments; this last character being too uncertain to have much weight, except when associated uniformly with other characters." The specific name proposed appears to sin against the international rules of botanical nomenclature, Chapter I, Art. 7. "Scientific names are in Latin for all groups." Gzlganleus is good Latin, and has frequently been used as a specific name; there appears to be no authority for gz;ga1zlicus. Page 119, cancel all under DEBARYA, and substitute, DEBARYA Wittrock, 1872, p. 35. Cells cylindrical, or contracted at the dissepiments; chromatophores either several, stellate, each with one pyrenoid, or a single axial plate with several...show more

Product details

  • Paperback | 92 pages
  • 189 x 246 x 5mm | 181g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236810457
  • 9781236810458