DISTRIBUTION OF YOUNG STAGES OF EUPHAUSIA SUPERB A 135 



At St. 201, between the east and west lines, there were seven lar\'ae with FurciHa 2 and 3 exceeding 

 in number FurciHa 4. 



Larvae were taken at each of Sts. 202-206: sixteen with Calyptopis 3 predominating, at St. 202; 

 seventeen, with FurciHa 3 predominating but no Calyptopis present, at St. 203; twenty-nine at 

 St. 204 with FurciHa 3 again predominating and five at St. 205 with two each of Calyptopis 2 and 3, 

 and one FurciHa i ; three larvae were found at St. 206, comprising two Calyptopis 2 and one 

 FurciHa 3. 



St. 209 in the middle of Deception Harbour yielded one Calyptopis 2. 



(g) Survey of April 1930 (Sts. 376-377). 

 These yielded no E. superha. 



The Bransfield Strait stations are noteworthy as the source of most of the records of 

 eggs in the plankton examined. Their abundance at certain stations has been discussed 

 in the section dealing with the distribution of eggs. Here it may be noted that in this 

 area, so highly specialized as far as hydrographic conditions are concerned, there is, 

 following the incidence of eggs early in the season, a widespread abundance of larvae in 

 the March-April survey. In this last survey Calyptopis 3 predominates and FurciHa 3 

 is conspicuous, but there is no well-defined directional arrangement in the distribution 

 of these stages. 



(7) Palmer Archipelago and Bellingshausen Sea 



Stations Year Time of year 



(a) WS 495-517 1929-30 December-February 



(6) 558-604 1930-31 December-January 



{c) 178-192 1927 March 



[a) December-February 1929-30 (Sts. WS 495-517). Fig. 56. 



Twenty-one vertical stations were made west of Graham Land in the Bellingshausen Sea: at two 

 only was there evidence of E. superba. St. WS 496 in 63 1 m. oiT Adelaide Island gave one adolescent 

 and two eggs and two eggs were found at St. WS 505 south-east of Peter I Island. 



{b) December-January 1 930-1 (Sts. 558-604). Fig. 57. 



Only nine vertical stations were made in the Bellingshausen Sea and only two eggs were found, at 

 Sts. 558 and 585. The former station was off the Biscoe Islands and the latter on the line made off 

 Adelaide Island. 



{c) Palmer Archipelago in March 1927 (Sts. 178-192). Fig. 58. 



Five vertical stations were made in the neighbourhood of Anvers and Brabant Islands, but only 

 two Calyptopis were taken — at St. 187 in the Neumayr Channel. 



The scarcity of plankton in the Bellingshausen Sea has been noted by Mackintosh 

 (1934), and E. superba is no exception to the general rule. Most of the stations, however, 

 were taken at a time of year when it would not be expected that many larvae would be 

 found, and although the adolescents, as will be seen later, were also few in number I do 

 not think that the evidence obtained here is sufficient to form any general conclusion 

 about the occurrence of very young larvae in this region. 



