PROCEEDINGS OF THE NATIONAL MUSEUM 

 Analysis of the above records 



Depth of net 



Total 

 number 

 of hauls 



Meters 



- 



25 



50 



75 



100 



150.. 



175.... 



200 



300 



Number 

 of hauls 

 in which 

 species 

 occurred 



Total 

 number 

 of speci- 

 mens 



1 1, 000 

 22 

 30 

 54 

 126 

 33 

 10 

 1 

 



Depth of net 



Iteiers 



400 



500.... 



600 



700 



750 



1,000 



1,100 



1,400 



1,800 



Total 

 number 

 of speci- 

 mens 



1 Approximate, 



Remarks. — Although this species occurred in hauls from the great- 

 est depth investigated, it must be regarded essentially as a surface 

 form, over 80 per cent of the specimens being caught with surface 

 nets. 



21. EUPHAUSIA BREVIS Hansen 



Occurrence 



