50 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



In 566 meters, with 54.5 grams: 



2 echinofds 93.2% 

 polychaetes 4.4 



sipunculids 1.8 



In 812 meters, with 3.8 grams: 



polychaetes 97.4% 



mollusks 2.6 



In 960 meters, with 105.7 grams: 



6 echinoids 96.5% 



polychaetes 3.5 



In 1105 meters, with 2.4 grams: 



polychaetes 83.3% 



2 sipunculids 12.5 

 ophiuroids 4.2 



In 1265 meters, with 11.8 grams: 



2 ophiuroids 55.1% 



polychaetes 44.9 



Santa Cruz canyon: — The samples, coming from depths of 89 to 

 1624 meters, were low in return; half measured less than 1.5 cuft al- 

 though taken with the large Campbell grab ; they came from sedi- 

 ments of sand, rocks, pebble or mixed sediments. Five others recovered 

 from 2.4 to 5.74 cuft each. Biomasses therefore show a broad range, 

 as follows : 



293.6 gm/ sq.m., in 459 m. 2.0 gm/ sq.m., in 902 m. 



35.0 gm/ sq.m., in 218 m. 1.8 gm/ sq.m., in 676 m. 



29.4 gm/ sq.m., in 89 m, 0.6 gm/ sq.m., in 800 m. 



14.0 gm/ sq.m., in 221 m. 0.2 gm/ sq.m., in 623 m. 



Weights were negligible in 1387 and 1624 meters. 



Percentages of weights by major animal groups are as follows: 



In 89 meters, with 14,7 grams: 



polychaetes 75% 



mollusks 21 



Scalpellum sp., barnacle 4 



In 218 meters, with 17.58 grams: 



ophiuroids 53.0% 



polychaetes 23.0 



Boltenia {!LSZ\d\3.n) 11.0 



I 



