. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C 16 25 m^m^^m^^^ &g&$&$ffi$®88! Int. 1 mm^^. FIG. 3. With posterior nerve cord left in position, the intestine of post- clitellar segments 16-25 is replaced by pharynx and oesophagus of segments 4-13. Result, negative. The antero-posterior orientation of the lower part of the dia- gram is reversed to correspond to that of Fig. 16. half months the worm was fixed. The sections (Figs. 20 and 21) show a well-formed brain, and commissures extending down to the nerve cord. Communication between the oesophagus and the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C 16 25 m^m^^m^^^ &g&$&$ffi$®88! Int. 1 mm^^. FIG. 3. With posterior nerve cord left in position, the intestine of post- clitellar segments 16-25 is replaced by pharynx and oesophagus of segments 4-13. Result, negative. The antero-posterior orientation of the lower part of the dia- gram is reversed to correspond to that of Fig. 16. half months the worm was fixed. The sections (Figs. 20 and 21) show a well-formed brain, and commissures extending down to the nerve cord. Communication between the oesophagus and the intestine was established, but no anterior opening from the pharynx to the outside. The outstanding feature of the case is the close relationship between the nervous tissue and the pharynx epithelium (Fig. 21). Type 3. Gut of a region behind clitellum replaced by pharynx; posterior nerve cord left in position. Case 68 (Figs. 3 and 16).—The pharynx and oesophagus from segments 4—13 replaced, in normal orientation, the intestine of post- clitellar segments 16-25. The posterior nerve cord was left 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
