GAMMARIDEAN AMPHIPODA 37 



Table 19.' — Corona del Mar, California, December 9-11, 1962, grid of 23 surface 

 samples of PhyUospadix-coraWine zone, station 46-A-E, the most abundant 

 species, with individuals per square meter. 



Hyale rubra frequens , 9,100; Elasmopus rapaz mutatus, 3,228; Photis elephantis, 688; Photi3 conchkola, 607; 

 Ampithoe poller, 476; Aoroides columbiae, 438; Ericthonius brasiliensis, 210; Jassa falcata, 188; Microjassa 

 litotes, 152, Cerapus tubularis, 106. 



Table 20.' — Corona del Mar, California, December 9-11, 1962, grid of 18 samples 

 of underrock substrate, station 46 H-I, list of all species, with individuals per 

 square meter. 



Ampithoe poller, 14; Melita sulca, 14; eusirid, 4; Dulzura sal, 3; Gitanopsis vilordes, 2; Paraphozus spinosus, 

 2; Photis sp., juvs., 2; Ericthonius brasiliensis, 1. 



Table 21.' — La Jolla, California, November 11-13, 1962, grid of 25 surface 

 samples of P/iT/Zfospad/x-coralline-cobble platform, station 45 A-E, list of most 

 abundant species, with individuals per square meter. 



Hyale rubra frequens, 4,890; Microjassa litotes, 2,177; Elasmopus rapax serricatus, 1,714; Photis breiipes, 935; 

 Photis conchkola, 745; Elasmopus antennatus ,736; Microdeutopus schmitti, 503; Cerapus tubularis, 498; Aoroides 

 columbiae, 408; Paraphoxus spinosus, 303; Ericthonius brasiliensis, 250; Amphilochus litoralis, 149; Megam- 

 phopus effrenus, 142; Jassa falcata, 142; Megamphopus martesia, 130. 



Table 22. — La Jolla, California, November 11-13, 1962, grid of 22 samples 

 of substrate scrapings beneath turnable rocks, station 45 F-G, list of the 

 most abundant species, with individuals per square meter. 



Elasmopus rapax serricatus, 293; Photis breiipes, 178; Microjassa litotes, 98; Cheiriphotis megacheles, 92; Maera 

 simile, 88; Aoroides columbiae, GO; Ampithoe pollex, 58; Hyale rubra frequens , 54; Heterophlias seclusus escabrosa, 

 38; Melita sulca, 38; Microdeutopus schrritti, 38. 



Table 23. — La Jolla, California, November 11-13, 1962, 6 samples on pitted 

 substrate of ridge covered with short-tufted red algae, near Bird Rock, 3rd 

 landward ridge, station 45 H-l, H-2, H-3, M-l, M-2, M-3, list of all species; 

 a non-quantitative wash of the same materials, 45-L-l, aliquotted and com- 

 pared to right. 



Species 



Ampelisca lobata 

 Ampithoe plumulosa 

 Ampithoe pollex 

 Aoroides columbiae 

 Cerapus tubularis 

 Elasmopus rapax serricatus 

 Elasmopus rapax mutatus 

 Elasmopus sp., juvs. 

 Ericthonius brasiliensis 

 Hyale rubra frequens 

 Mkrojassa litotes 

 Jassa falcata 

 Megamphopus martesia 

 Microdeutopus schmilti 

 Paraphoxus spinosus 

 Parapleustes pugettensis 

 Photis brevipes 

 Photis sp.,juvs. (prob. brevipes) 



Table 24.— La Jolla, California, November 11-13, 1962, 3 samples of sand- 

 inundated algae at high tide line, 45-R-l, R-2, R-3, list of all species, with 

 individuals per square meter. 



Hyale rubra frequens, 16,100; Ampithoe pollei , 7,920; Aoroides columbiae, 1,910; Jassa falcata, 1,012; Lysianassa 

 macromerus, 367; Orchestia sp., 88; Microdeutopus schmitti, 73; Paraphoxus spinosus, 59; Photis sp., juvs., 29; 

 Corophium baconi, 29. 



