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U.S. NATIONAL MUSEUM BULLETIN 291 



Figure 62. — Vertical distribution by 250-meter increments of total sample population of 

 Antarctic Bathyteuthis abyssicola captured by standardized 2-hour tows. 



These were taken under very unusual oceanographic conditions, ap- 

 parently during a period of extreme upwelling at the localities — see 

 below. ) 



The major block of specimens comes from 500-2500 m. Only a few 

 individuals have been taken from 2500-3000 m (fig. 62). The follow- 

 ing calculations are designed to indicate if the few specimens from 

 tows that fished below 2500 m actually were captured in these depths. 



Total number of 2-hour tows taken between 500-2500 m=215 



Total number of specimens captured between .500-2500 m=565 



Therefore, average number of specimens captured per 2-hour tow between 500- 



2500 m=2.63 

 Total number of 2-hour tows taken between 2,500-3000 m=21 

 Total number of specimens captured between 2500-3000 m=33 

 Therefore, average number of specimens captured between 2500-3000 m=1.57 



