46 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



123.2 gm/ sq.m., in 478 m. 43.0 gm/ sq.m., in 140 m. 



1 15.7 gm/ sq.m., in 235 m. less than 10 gm/ sq., in 741 m. 



1 13.0 gm/ sq.m., in 1 70 m. 



Ranging these values by major groups of animals, the following 

 percentages are obtained : 



In 16 meters, wnth 47.9 grams: 



1 Cerebratulus sp. 60% 



polychaetes 16.0 



crustaceans 1 1 ,0 



Schizocardium sp. 9.0 



moUusks 4.0 



In 37 meters, with 40.8 grams : 



polychaetes 38.0% 



enteropneusts 37.0 



nemerteans 11.0 



others 12.0 



In 85 meters, with 73 grams : 



polychaetes 86.3 % 



moUusks 13.7 



In 97 meters, with 51.1 grams: 



polychaetes 81.6% 



echinoderms 14.0 



mollusks 2.4 



crustaceans 0.7 



others 1.3 



In 140 meters, with 21.5 grams: 



polychaetes 93.0% 



mollusks 7.0 



In 170 meters, with 56.5 grams: 



polychaetes 54.9% 



nemertean 41.1 



mollusks 4.0 



In 178 meters, with 43.1 grams: 



polychaetes 70.0% 



1 Brisaster toivnsendi 30.0 



In 21 1 meters, with 253.2 grams : 



\ Molpadia intermedia 28.0% 



1 Brisaster toivnsendi 13.2 



