Bathymetric Distribution of Chaetognaths — Alvarino 
75 
11.16 12.02 15.48 18.12 19.40 16.77 
Fig. 7. Profile of the Transpac Expedition, Stations 4-24 (35° 46.8' N, 130° 02.5' W and 53° 15.0' N, 
161° 55.0' W). 
scrippsae ( epiplanktonic, although at the south- 
ernmost part of its distribution region this 
species sinks with the waters it populates). 
Epiplanktonic species appearing at deeper 
layers than usual may indicate a convergence. 
An illustration of this point was found by the 
author in a region in the south central Pacific, 
where the respective northern and southern 
boundaries of distribution of S. gazellae and S. 
pacifica coincide at depths below 200 m. This 
overlapping in the distribution of S. gazellae 
and S. pacifica was obtained from the examina- 
tion of samples from the Downwind and Mon- 
soon expeditions. The stations of the Downwind 
Expedition used in this case extended from 23° 
30' N— 125° 05' W to 46° 25' S— -123° 38' W 
and 125° 03' W (October 1957 to December 
1957), and from 10° 01.5' N— 118° 58' W to 
other epiplanktonic 
species 
S.decipiens 
Fig. 8. Profile Stations 94-106 of the NORPAC CalCOFI Expedition (31° 01' N, 118° 07' W to 27° 25' 
N, 150° 00' W) . The distribution of S. scrippsae has been disclosed from the other species that occur in the 
same region. 
