. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 290 C. H. TURNER. exposed. This is the case when it is removing an obstacle from its pit. Since this larva burrows downward into the earth, it may be considered positively geotactic; but, it must be remembered that it does not always pass downward. When disturbed in its pit, it usually backs upward, just beneath the surface, until the rim is reached; sometimes, it continues onward, in a horizontal direction, beneath the surface. MacLachlan (n) observed that, at night, they frequently make perigrinations over the surface of t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 290 C. H. TURNER. exposed. This is the case when it is removing an obstacle from its pit. Since this larva burrows downward into the earth, it may be considered positively geotactic; but, it must be remembered that it does not always pass downward. When disturbed in its pit, it usually backs upward, just beneath the surface, until the rim is reached; sometimes, it continues onward, in a horizontal direction, beneath the surface. MacLachlan (n) observed that, at night, they frequently make perigrinations over the surface of the ground. Then, too, they sometimes ascend vertical surfaces. When placed on a horizontal surface [I used sheets of brass,. Ant-lion pit in one of my tumblers. glass, wood, and cardboard], the larva backs away from the light. If placed with the tip of its abdomen toward the source of light, usually, it will move a short distance toward the light then turn, to either the right or the left, and back away in a straight line. This, coupled with the fact that, when placed on its back, the ant-lion invariably rights itself by turning away from the source of light, induces the conclusion that this creature is negatively phototactic; but, it must be remembered that in. 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
