266 



DISCOVERY REPORTS 



The Copepoda, with the exception of Metridia lucens which shows little or no decline 

 in May and appears to be an autumnal form, all show an increase with the advance of 

 summer and decline in the late autumn, just as they do in the northern hemisphere. In 

 Table XLVII the average numbers of the commoner Copepoda per 50 m. in the upper 

 250 m. are shown for these four months. 



Table XLVII 



The average number of the commoner Copepoda per 50 m. haul with the A 7 70 V net in the 

 top 250 m. off the north-east coast of South Georgia in November, December and May, 

 1926-7 season, and in March 1925-6 season 



Table XLVII I 



Showing the temperature in ° C. at stations taken at different times of the year at approxi- 

 mately the same position 15 miles off the north-east coast of South Georgia 



* Depth 240 m. 



Very few of the Amphipod Parathemisto gaudichaudi were taken in November and 

 May, but they were abundant in December and particularly in March. Very few of the 

 Euphausiacea, Euphausia frigida, E. superba, and Thysanoessa, were taken in November, 



