. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEAD REGENERATION IN THE EARTHWORM 473 In Case 17 the resulting conditions are somewhat different. The operation was the same as that above (Case 37) except that the sleeve was slipped over the intestine of post-clitellar segments 12-14 instead of 15-17. The length of time between operation and fixation was the same in both. In Case 17, however, a brain formed without any rela- tion whatever to the ventral nerve cord. No commissures were evident; there is no anterior opening of the gut to the outside. Cases 78 and 79 differ
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEAD REGENERATION IN THE EARTHWORM 473 In Case 17 the resulting conditions are somewhat different. The operation was the same as that above (Case 37) except that the sleeve was slipped over the intestine of post-clitellar segments 12-14 instead of 15-17. The length of time between operation and fixation was the same in both. In Case 17, however, a brain formed without any rela- tion whatever to the ventral nerve cord. No commissures were evident; there is no anterior opening of the gut to the outside. Cases 78 and 79 differ from both of the preceding in that the posterior nerve cord grew forward almost to the end of the sleeve. Except these last three cases, all of this type agree in result with that of Case 37. 15 16 mmm&z&m m&m t®.. 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
