36 



DISCOVERY REPORTS 



phytoplankton inshore was very scanty, an observation which agrees with Hardy's 

 findings ; farther offshore on the eastern side the comparatively rich beh spreads up to 

 the north, and the small inshore patch with moderately rich phytoplankton to the north 

 was evidently not of the same origin, as it contained no Tli. antarctica. To the east, 

 south-east and north-east of the island, this species was found in very considerable 



Fig. 12. Chart showing the general distribution of Diatomales (totals per loo-o m. haul), South Georgia 

 survey, January-February 1930. This chart is based on catches made at the positions indicated in Fig. 13. 



abundance at some distance from the land, but was almost totally lacking on the west 

 side and in the thin phytoplankton from the inshore stations (Fig. 13). The ubiquitous 

 Corethron valdiviae in the spineless chain form was present among the scanty hauls close 

 in to the land and to the west of the island, but its abundant occurrence coincided with 

 that of Thalassiothrix with two important exceptions (Fig. 14). These were the small 

 moderately rich patch round Bird Island, and the two late stations, worked at the end 

 of the Larsen line, that completed the survey. As these temperatures were high, 

 Thalassiothrix was absent, and dinoflagellates present in large numbers as previously 



