BATHYPELAGIC SQUID BATHYTEUTHIS 109 



tiire was made at 37°57'W where a tongue of cold water below 0.5° C 

 ascends to a shallower depth; this accounts for the slight discrepency 

 in the location of the plot. The single specimen that was taken at 47° S 

 came from a water temperature of about 2.5° C. 



In relation to salinity nearly all the captures are associated with 

 the high salinity segment of the Antarctic Circumpolar Water. Seven 

 captures were in 34.70%o or greater; three were in 34.73%o. The south- 

 ernmost specimen came from water of 34.69%o. If the deepest specimen 

 actually came from 2575 m it was taken in 34.69%o also ; if it came from 

 a few hundred meters shallower it was in salinities over 34.70%o. The 

 northernmost specimen was captured in 34.56%o. 



Seven of the captures were made at a density of sigma-t= 27.80- 

 27.85, two from greater than 27.85, and one, the northernmost, from 

 27.60. 



All captures lie within or below^ the layer of minimum oxygen. The 

 southernmost capture was made in an oxygen concentration greater 

 than 5 ml/L. The remaining eight captures in the antarctic region 

 were taken in oxygen concentrations of about 4.60 ml/L; five of these 

 were taken along the 4.83 ml/L line that descends northward. The 

 shallowest capture was 810 m in the oxygen minimum and the deepest 

 2575 m near the oxygen maximum. The specimen at 47°S was taken 

 in the oxygen minimum at a value of 4.16 ml/L. 



In summary, the majority of captures was made at temperatures 

 between 1° and 1.5° C, at salinities at or near the maximum (34.70%o- 

 34.73%o), at high densities greater than sigma-t = 27.80, and at mod- 

 erate oxygen concentrations below^ the oxygen minimum layer. 



55° West Longitude; 52** to 62° South Latitudes 



The sections along 55 °W lie in the eastern end of the Drake Passage 

 and extend from just north of Elephant Island to just east of the 

 Falkland Islands. The oceanographic data were collected during mid- 

 summer during Eltanhi Cruise 6. Unfortunately there must have been 

 some wide gaps between Nansen bottles because the data tabulated 

 in Friedman (1964) are rather scattered. This means that a certain 

 amount of interpolation has been necessary in constructing the sections 

 and in determining the siliiultaneous values for the captures. Jacobs 

 (pers. c^mm.) has w^amed that some of the early Eltanin oceano- 

 graphic data may not be too reliable. 



The temperature section (fig. 25) locates the Antarctic Convergence 

 between 58° and 59° S. The relatively warm Subantarctic Surface and 

 Upper Waters to the north of the convergence represent the Falkland 

 Current which bends northward in this region. The 2.5° isotherm de- 

 scends from the convergence zone and, after a reverse trend at 56°S, 

 it drops to 1500 m where it levels off to the north. The 2° isothenii 



