. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SPIOCHAETOPTERUS: TUBE AND FEEDING 403 parently a continual process and would account for the gradual thickening of the tube wall between new and older sections. The convex ventral surface is always pressed against the tube surface. The transverse partitions which partially block the lower part of the tube are secreted by the head region. The worm reverses itself in the tube if previously directed upward, and then moves downward toward the lower part of the tube. At the level at which the partition is to be placed, the worm
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SPIOCHAETOPTERUS: TUBE AND FEEDING 403 parently a continual process and would account for the gradual thickening of the tube wall between new and older sections. The convex ventral surface is always pressed against the tube surface. The transverse partitions which partially block the lower part of the tube are secreted by the head region. The worm reverses itself in the tube if previously directed upward, and then moves downward toward the lower part of the tube. At the level at which the partition is to be placed, the worm halts its downward movement. The head is flexed slightly inward (dorsally) and then rapidly. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
