CLASSIFIED RESUME OF ORGANISMS OBSERVED 3OI 

 Phylum ANNELIDA 



Few segmented worms were observed, and the host of 

 small ones which inhabit the waters completely escaped 

 notice. Those which were reported were seen between 130 

 and 1600 feet. The largest worm, glimpsed at 1503 feet, 

 was about six inches long and brightly luminous. Another 

 luminous worm, its whole body aglow, was sighted at 1208 

 feet. At 1600 feet a group of about fifty individuals was 

 seen, each one dully illuminated. Once only, at 550 feet, 

 several long-tentacled worms appeared briefly, but no de- 

 tails of structure or color could be distinguished. In fact, 

 no taxonomic characters were visible in any of the annelids 

 observed. Worms other than Chaetognaths are uncommon 

 in our trawling nets, fifteen or twenty being the maximum 

 number caught in the four-hour horizontal towing of a 

 single net. 



Phylum ARTHROPODA 

 class CRUSTACEA 



Order copepoda 



Bathysphere observations constantly emphasized the fact 

 that copepods are the most abundant of all marine organ- 

 isms, with the exception of the microscopic plankton. At 

 no time were there less than several dozen in sight, 

 within a few feet of the window, and though at the lower 

 depths a definite decrease of their numbers was noticeable, 

 there was nevertheless no instant when a mist of plankton 



