2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Methods and Materials 



The area in the western Indian Ocean from where the 51 samples 

 considered in this paper were obtained is bounded by latitude 18°N 

 and 40°S and longitude 50° W and 80°W (fig. 1, table 1). Three types 

 of collecting gear were used to sample the deep-living copepods : 



Be multiple plankton sampler: Six of the collections analyzed 



40° 50° 60° 70° 



Figure 1. — Location of collection stations. 



were collected by this sampler (described by Be, 1962), hereafter 

 designated the Be net or sampler. The sampler was equipped with 

 a number 3 net (.333 mm aperture), and the samples obtained be- 

 tween the 1000 and 2000 m depth interval on Anton Bruun Cruise 

 2 were studied. A total of 876 adult copepods (139 species) were 

 identified in these samples. No volume measurements were made. 



