. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ^ORANGE R. SURVEY 1 IO° 15° EAST Fig. 91. Distribution of Fragilaria karsteni and F. granulata, survey II, September-October 1950. (Station numbers are shown in Fig. 2.) NIL ?. Fig. 92. Distribution of Thalassiothrix longissima, survey I, March 1950. Expressed as a percentage of the total diatoms. (Station numbers are shown in Fig. 1.) succeeded by R. styliformis, more or less co-dominant with varying proportions of R. alata, these last being superseded in the extreme north of the area studied b
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ^ORANGE R. SURVEY 1 IO° 15° EAST Fig. 91. Distribution of Fragilaria karsteni and F. granulata, survey II, September-October 1950. (Station numbers are shown in Fig. 2.) NIL ?. Fig. 92. Distribution of Thalassiothrix longissima, survey I, March 1950. Expressed as a percentage of the total diatoms. (Station numbers are shown in Fig. 1.) succeeded by R. styliformis, more or less co-dominant with varying proportions of R. alata, these last being superseded in the extreme north of the area studied by Dactyliosolen mediterraneus. In Fig. 95 an attempt has been made to demonstrate another aspect of distributional study, the development of a localized flora where the distinctive offshore and inshore populations most nearly approached each other, near the northern limits of the rich upwelling zone in autumn. The distribu- tions shown are estimated numbers of Planktoniella sol, regarded as the characteristic offshore form; Goniaulax spinifera, the dinoflagellate predominating in the intervening ' patch' j1 and the estimated 1 The word ' patch' is here used in its generally accepted sense to describe the area where Goniaulax predominated. It is not intended to denote exceptional population density as in descriptions of visibly discoloured areas resulting from water-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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