. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 326 I). K KIT 11 SERAFY TABLE IV Statistics for discretely variable characters of O. aculeata that ctiange with size* Character Class N Mean of disk diam. (mm)** Standard deviation (mm) Range (mm) Number of arm spines (4) 11 2-4 (5) 203 2-14 (6) 329 6-19 (7) 57 10-19 Number of oral papillae (2) 24 2-11 (3) 403 2-19 (4) 165 5-19 (5) 6 10-17 (6) 2 12-14 A bora 1 arm platelet (present) 23 2-8 spines (absent) 577 2-19 * All p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 326 I). K KIT 11 SERAFY TABLE IV Statistics for discretely variable characters of O. aculeata that ctiange with size* Character Class N Mean of disk diam. (mm)** Standard deviation (mm) Range (mm) Number of arm spines (4) 11 2-4 (5) 203 2-14 (6) 329 6-19 (7) 57 10-19 Number of oral papillae (2) 24 2-11 (3) 403 2-19 (4) 165 5-19 (5) 6 10-17 (6) 2 12-14 A bora 1 arm platelet (present) 23 2-8 spines (absent) 577 2-19 * All populations were considered together. ** The mean of the disk diameters was calculated for each class. The mean length of the longest oral disk spines (Tables I and III) is essentially the same in the Newfoundland and Greenland samples but is signif- icantly longer in the Maine sample. An increase in length of oral disk spines is correlated with an increase in disk diameter, but the correlation coefficients are low, varying from for the three samples. The morphology of the oral disk spine tips (Tables II and III) differs signif- icantly between Maine and Newfoundland but is essentially the same in New- 0) c «> . - -j 4) C "o. M Maine Newfoundland Greenland. 5 10 Disk Diameter 15 FIGURE 1. Linear regression lines for arm spine length as a function of disk diameter in the three populations of O. aculeata. All measurements are 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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