THE SCHIZOPODA. 



125 



The distribution of the species during day and niglit is sliown in the following table 

 for comparison with the other common species : — 



As Messrs. Holt and Tattersall point out, the failure to capture a single specimen 

 at any depth ichatsoever during daylight is most curious, and must be left unexplained 

 for the present. 



Nematoscelis megalops. 



The vertical distribution of this species was apparently very similar to that of 

 JEuphaiisia Miilleri. 



o 

 ►a 



CD 



P 



CO 



o 



Q 



^ 2. 



s 



J 







25 



50 



75 

 100 

 150 

 200 

 250 

 300 

 350 

 150-50 

 200-100 

 300-200 

 400-300 

 500-400 

 750-500/' 



CO 



3.0 



CO 



0-2 \ 

 1-9 

 6-6 

 6-2 

 3-8 J 







 

 



1 







1 

 1 





 5 

 

 1 



\ 



2 3 



CS' CD 



O OD 



P 'rs 



i-S CB 



P B 



09 



99 

 O 



P 

 P 



►3 

 O 

 O 



3 



Q 



P 



Prom this table * it is apparent that the centre of distribution lay about 50 and 75 

 fathoms ; it occurred in only 13 per cent, of the 23 hundred-fathom sections with the 

 closing-net betweea 750 and 100 fathoms, with an average of 0-3 specimens per 

 100 fathoms. 



It is possible, as Messrs. Holt and Tattersall suggest, that this species exhibits a 

 diurnal fall and nocturnal rise like Euphausia Miilleri, but neither the time-depth 



* If haul 31 b were included (compare p. 122, note) the average specimens per hour at 50 fathoms would have 

 been 130. 



