. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 2 OLGA HARTMAN : SUBMARINE CANYONS 29 A diversified shelf fauna exists in 79 and 121 meters, as well as in shelf depths with algal debris farther from shore. Some species attain peak numbers; such are Aricidea lopezi with more than 310 individuals per sample in 79 m, Ancistrosyllis tentaculata with 69 and Cossura Candida with 86 in a sample. Axis depths, in 135 to 371 meters, have sediments of sand and pebbles; animals are almost entirely Capitella capitata subspp. in tre- mendous numbers, with 14,145 individuals count
. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 2 OLGA HARTMAN : SUBMARINE CANYONS 29 A diversified shelf fauna exists in 79 and 121 meters, as well as in shelf depths with algal debris farther from shore. Some species attain peak numbers; such are Aricidea lopezi with more than 310 individuals per sample in 79 m, Ancistrosyllis tentaculata with 69 and Cossura Candida with 86 in a sample. Axis depths, in 135 to 371 meters, have sediments of sand and pebbles; animals are almost entirely Capitella capitata subspp. in tre- mendous numbers, with 14,145 individuals counted in a sample from 274 m (Hartman, 1961, p. 333); some harbor an endoparasitic copepod, Monstrilla capitellicola (Fig. 11). At middle depths, in 517. Fig. 11. Monstrilla capitellicola, a parasitic copepod, at left side, and a parasite in the host species, Capitella capitata oculata, at the right side, greatly Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Allan Hancock Foundation. Los Angeles, University of Southern California Press
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