. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. 4.] MORPHOLOGY OF Till-: ACTI.\OZOA. 157 endocoelic spaces bounded by the perfect mesenteries. The sections did not, unfortunately, cut the column perfectly trans- versely, but the arrangement which obtained may be perceived from the representation of the half of one section shown in Fig. i, and from the diagram (Fig. 2) which represents a reconstruction from a perfect series of sections. On each side of the median line of Fig. i is one of a pair of directives, that to the right being cut at the level of the oral stoma,
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. 4.] MORPHOLOGY OF Till-: ACTI.\OZOA. 157 endocoelic spaces bounded by the perfect mesenteries. The sections did not, unfortunately, cut the column perfectly trans- versely, but the arrangement which obtained may be perceived from the representation of the half of one section shown in Fig. i, and from the diagram (Fig. 2) which represents a reconstruction from a perfect series of sections. On each side of the median line of Fig. i is one of a pair of directives, that to the right being cut at the level of the oral stoma, as is also another mesentery in the right half of the figure. On each side of the. T FIG. i. — Transverse section through the upper part of the column of Halcuriaspilatjis. T = tentacle. D — directive mesenteries. directives is a perfect mesentery with its muscle pennon on the same side as that of the adjacent directive, and on the left side this mesentery is succeeded by one which evidently forms with it a typical pair, though it may be noticed that the endo- coel enclosed by this pair is broader than the adjacent exocoels. On the right side, where, owing to the obliquity of the sec- tions, the column is cut higher up, the bases of some of the tentacles (T) being cut, the mesenteries of the first lateral pair are widely separated, and between them three imperfect pairs occur, which evidently represent two cycles. The succeeding. 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
