40 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



TABLE 9 



Amphipoda known from the basins but not from the submarine canyons. 



Harpiniopsis excavate, Bonnierella linearis californica, Sophrosyne 

 robertsoni, Hirondellea fidenter, Lepidepecreella charno, Coxophoxus 

 hidalgo, Ampelisca amblyopsoides. 



TABLE 10 



Density of Amphipoda in relation to depth in submarine canyons of 

 California. 



TABLE 11 



Abundant Amphipoda of the coastal shelf of southern California, 

 5-183 m, based on 348 samples, listed in rank, with number of individ- 

 uals/m^. 



Paraphoxus bicuspidatus, 58 ; Ampelisca brevisimulata, 44 ; Hetero- 

 phoxus oculatus, 31; Ampelisca cristata, 27; Paraphoxus abronius, 23; 

 Metaphoxus frequens, 22; Photis brevipes, 21 ; Amphideutopus oculatus, 

 21; Ampelisca macrocephala, 17.3; Paraphoxus similis, 16.7; Para- 



