GAMMARIDEAN AMPHIPODA 33 



Table 1. — Spatial distribution of quantitative samples in grids at Carmel Point, 

 Cayucos, Hazard Canyon, Corona del Mar and La Jolla, California. Samples 

 are spaced at 3 meter intervals on lines — Continued 



Station 46 



C orona del Mar, California, December 9-11, 1962, Jioth sq. m. samples on a flat reef of shale, no loose rocks, 

 in zone of Phyllospadlz , coralline algae, Egregia sp., pelvetiid, tufted red algae. 

 Toward sea Toward land 



Line A B C 



1 

 2 

 3 

 4 

 5 



J-Soth sq. m. samples in a zone southeast of first grid, with turnable rocks, samples taken of substrate under 

 rocks, largely sand. 



Toward sea Toward land 



Line H123 456789 



1123 456789 



Station 45 



La Jolla, California, November 11-13, 1962, >ioth sq. m. samples. 



C oralline-gracilari Did- Ph yllospadiz mixed with loose cobbles and sand pockets, samples scraped from tops 

 of rock. 



Toward land Toward sea 



Table 2. — Relative densities of Amphipoda, as individuals per square meter, 

 in various groups of grid samples. 



P/ij/^ospad/r-pelvetiid zones 



Carmel, epifaunal cobble-boulders, poor epiflora 804 



fixed substrate, medium epiflora 1, 725 



Cayucos, rich epiflora 21,839 



Goleta, intermediate epiflora 13, 476 



Pt. Dume, poor epiflora 2,250 



Corona del Mar, Phyllospadit-coTaUine, rich epiflora 15,904 



La Jolla, Phyllospad i i -coralline, rich epiflora 14, 716 



Algal turf on platforms 



Hazard Canyon 4,222 



Pt. Dume 9,421 



La Jolla 18, 393 



Coralline algae, Pt. Dume 17, 570 



Phragmatomid masses, Pt. Dume 1,382 



Underrock substrates 



Corona del Mar 42 



La Jolla 1,194 



Table 3. — Carmel Point, California, December 30-31, 1963, grid of 25 samples 

 of station 48 A-E, on surfaces of cobbles and boulders in pelvetiid zone, list 

 of all species, with individuals per square meter. 



Oligochinus lighti, 644; Hyale grandkornis californica, 54; Allorchestes anceps 50; Hyale rubra frequens, 20; 

 Parapleustes nautilus, 18; Ampithoe poller, 8; eophliantid, 4; Jassa falcata, 2; Ampithoe simulans, 2. 



