. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. PHYTOPLANKTON OF BRANSFIELD STRAIT 117 siderable numbers. Turning to the northernmost station on the line, St. WS 476, the inshore character of the surface water was indicated by the presence of the small species of Tintinnid previously referred to (p. no). The catch here was not so large, less than five million phytoplankton organisms being estimated to be present; Corethron valdiviae was again dominant, but Thalassiosira antarctica accounted for nearly 25 per cent of the catch. At the next sta
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. PHYTOPLANKTON OF BRANSFIELD STRAIT 117 siderable numbers. Turning to the northernmost station on the line, St. WS 476, the inshore character of the surface water was indicated by the presence of the small species of Tintinnid previously referred to (p. no). The catch here was not so large, less than five million phytoplankton organisms being estimated to be present; Corethron valdiviae was again dominant, but Thalassiosira antarctica accounted for nearly 25 per cent of the catch. At the next station to the southward, Corethron again predominated in a much richer haul, in which Fragilaria antarctica, Thalassiosira antarctica, Rhizosolenia gracil- lima, Biddidphia striata and Coscinodiscus bouvet were all more abundant than has been found usual in this area. 56°. Fig. 56. Reference chart showing the positions of the stations worked in Bransfield Strait in November 1929, and in December 1930. Still farther to the southward, at St. WS 478, a much smaller catch was obtained, more comparable to that from the inshore station, except that Corethron was more markedly dominant. Local current systems have been encountered in this vicinity on other occasions, and it is possible that this break in the continuity of rich hauls is to be ascribed to some such cause, as the phytoplankton at the succeeding station, St. WS 479, closely resembled that at St. WS 477 both in character and bulk, the only notable difference being that Thalassiosira antarctica and Fragilaria antarctica were not so numerous. As before, Corethron was strongly dominant, a statement which also applies to the catch at the next station, St. WS 480, where the proportion of the smaller forms decreased still further, despite the fact that the rise in salinity indicates that the region of the Weddell Sea influence was being Please note that these images are extracted from scanned page images that may have
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