. Fig. 80. Estimated total diatoms and diatom group totals, survey II, Orange river line, 21-24 September 1950. relatively large numbers of Trichodesmium thiebautii, the filamentous, sometimes colonial blue-green alga most important among the few ' other plants' in these samples, were met with. Finally, the Orange river line showed an extraordinary reversal of the conditions observed during the first survey, the two diatom-rich stations now being found far beyond the projecting shelf-edge at the outer end of the line. Further, they showed a most extraordinary admixture of species. Though ocean
. Fig. 80. Estimated total diatoms and diatom group totals, survey II, Orange river line, 21-24 September 1950. relatively large numbers of Trichodesmium thiebautii, the filamentous, sometimes colonial blue-green alga most important among the few ' other plants' in these samples, were met with. Finally, the Orange river line showed an extraordinary reversal of the conditions observed during the first survey, the two diatom-rich stations now being found far beyond the projecting shelf-edge at the outer end of the line. Further, they showed a most extraordinary admixture of species. Though oceanic forms such as Chaetoceros atlanticum, C. peruvianum and Planktoniella sol were among the dominants, the essentially coastal Chaetoceros compressum was abundant at station WS 1055. In the
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
