. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 154 KENNETH P. SEBENS yJv' wi? ?>*' v^'-i--^ i. FIGURE. 1. Clonal aggregations of Anthopleura elegantissima (left) above /4. xanthogrammica (middle) on a rock surface and Metridium senile (right) on a subtidal rock wall (positioned next to the others for comparison). (tentacle length and width at mid-length). The surface of each tentacle was cal- culated as that of a cylinder, since much of the taper occurs near the tip in M. senile and A. elegantissima. A cone could have been used, but the difference between the two meth
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 154 KENNETH P. SEBENS yJv' wi? ?>*' v^'-i--^ i. FIGURE. 1. Clonal aggregations of Anthopleura elegantissima (left) above /4. xanthogrammica (middle) on a rock surface and Metridium senile (right) on a subtidal rock wall (positioned next to the others for comparison). (tentacle length and width at mid-length). The surface of each tentacle was cal- culated as that of a cylinder, since much of the taper occurs near the tip in M. senile and A. elegantissima. A cone could have been used, but the difference between the two methods was less than 5%. Total tentacle surface was calculated as the number of tentacles multiplied by the mean surface area of the five single tentacles. The tentacles of M. senile were too small and numerous to count from pho- tographs. Individuals were measured in the field (basal diameter), collected, relaxed in MgCl2 (1:1 in sea water), and frozen. Depending on its size, the tentacle crown was subdivided into 4, 8, 16, or 64 parts, and three samples were chosen for tentacle counts. Tentacle number was calculated as the mean (± standard devia- tion) of the three samples (multiplied by the number of tentacle crown subdivisions) and tentacle surface as the number of tentacles multiplied by the surface area of a single tentacle. Correlations and principal axes were determined on double log-. 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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