Appendix 



After the manuscript had been completed, a portion of the missing 

 specimens was found and sent to me. With the exception of one lot 

 of three specimens from Cruise 10, these specimens were all captured 

 during Cruise 11 which took place from mid-December 1963 to mid- 

 February 1964 ; the Eltanin worked southward approximately along 

 115°W to TO°S, eastward to 90°W, then northward. All specimens 

 were taken south of 55 °S. 



During Cruise 11 a total of 40 tows was made below 500 m; of these 

 33 were successful in catcliing 110 specimens of B. ahyssicola. (Two 

 captures with one specimen each were available earlier and were also 

 included in the original discussion.) Of the seven unsuccessful tows, 

 six fished shallower than 1000 m. The captures were made in water 

 temperatures that ranged from about 0.5° C to less than 2.5° C, with 

 the majority between 1° and 2° C. Also, the captures were taken in 

 waters that had salinities above 34.70%o, oxygen concentrations above 

 4.00 ml/L, and sigma-t values above 27.50. Therefore, these additional 

 specimens occurred within the ranges of values already determined 

 in the original study material. 



The addition of the material from Cruise 11 only slightly alters 

 the earlier results. The tows during Cruise 11 had a success-of -capture 

 rate of 83%; this increases the combined success rate in the South 

 Pacific and South Pacific Convergence regions from 67% to 72%. The 

 average number of specimens per total tow was slightly less than 3, 

 while the previous value was sliglitly more than 3. 



All captures were made in late December and throughout January. 

 Two tows made exceptional catches of 13 and 25 specimens (30 Decem- 

 ber and 10 January) ; one was in the convergence zone and the other 

 was slightly to the north but in water with the same characteristics 

 as those in the convergence zone. The high rate of success of tows and 

 the two exceptional catches add support to the suggestion made above 

 tliat the abundance of B. ahyssicola in Antarctic watere is greater dur- 

 ing the austral spring and summer months. 



Eleven of the specimens were greater than 50 mm ML (range 50-61 

 mm ML) ; only 3 (27%,) of these were males (50-54 mm ML). This 

 is about the same relationship between numbers of large males and 

 large females that was described above. 



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