. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 76 MARY J. ROSS. as in Figs. 4, 9, 12, the more advanced and earlier stages are often seen in the same section. In no stage, however, were the two extremes, i. c., a completed gland and a beginning one, found. In a larva of 16 mm. the stomach is entirely formed, but as yet no glands open on the surface. Figs. S-ii show glands further developed than those just described. By the increase in size of the gland and the multiplication and rearrangement of the cells W^>-"::,^'^ •' '^f^--,-':'--.:.:^: :•••'. <^-vs ^ipi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 76 MARY J. ROSS. as in Figs. 4, 9, 12, the more advanced and earlier stages are often seen in the same section. In no stage, however, were the two extremes, i. c., a completed gland and a beginning one, found. In a larva of 16 mm. the stomach is entirely formed, but as yet no glands open on the surface. Figs. S-ii show glands further developed than those just described. By the increase in size of the gland and the multiplication and rearrangement of the cells W^>-"::,^'^ •' '^f^--,-':'--.:.:^: :•••'. <^-vs ^ipi;|ll?^Sig^£i^. Fir,. 10. Same as Fig. 8. lining the stomach, the excretory duct is being formed (Fig. 9, d}. Before the connection between the fundus of the gland and the excretory duct is established, a lumen is formed in the gland fundament (Figs. 8, 9, /). This appears to be caused by a re- arrangement of the cells and not by a cell disintegration. The connection between the duct and fundus, forming the neck of the gland, is also brought about by a rearrangement of the cells and not by a cell disintegration. In Figs. 12-17 some of the glands. 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
