. SYLVIA HILL ORANGE R. 10° 15° EAST Fig. 88. Distribution of Asterionella japonica, survey I, March 1950. (Station numbers are shown in Fig. 1.) survey. Less numerous, but almost equally widespread in spring. The narrowing of the coastal zone and apparently increased tendency towards fanning-out of the coastal waters in the extreme north of the area at that season were features shown in some degree by other important inshore species. The distribution of both the species of Fragilaria met with is shown in Figs. 90 and 91. Fragilaria karsteni proved to be the most strictly coastal of the diatom
. SYLVIA HILL ORANGE R. 10° 15° EAST Fig. 88. Distribution of Asterionella japonica, survey I, March 1950. (Station numbers are shown in Fig. 1.) survey. Less numerous, but almost equally widespread in spring. The narrowing of the coastal zone and apparently increased tendency towards fanning-out of the coastal waters in the extreme north of the area at that season were features shown in some degree by other important inshore species. The distribution of both the species of Fragilaria met with is shown in Figs. 90 and 91. Fragilaria karsteni proved to be the most strictly coastal of the diatoms encountered in the plankton here during both surveys; one might almost describe it as neritic. Though somewhat less widespread in autumn than it was during the spring survey, the heaviest individual hauls of the species were obtained in autumn near Walvis Bay. Fragilaria granulata was a species of the outer shelf stations and offshore waters found mainly in
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