. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 302 LEONARD P. SAYLES of the anal segment missing and with a cone of new material projecting posteriorly into the open region. Figure 9 shows a bud of this type formed at the eleventh segment. This region where part of the anal segment was missing would, in any of these relatively short buds, be. FIG. 4. Head bud induced at tenth segment. Age, 19 days. K, knob of new material on dorsal side of peristomium. FIG. 5. Head bud induced at tenth segment. Age, 18 days. FIG. 6. Tail bud induced at tenth segment. Age, 22 days. A, par
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 302 LEONARD P. SAYLES of the anal segment missing and with a cone of new material projecting posteriorly into the open region. Figure 9 shows a bud of this type formed at the eleventh segment. This region where part of the anal segment was missing would, in any of these relatively short buds, be. FIG. 4. Head bud induced at tenth segment. Age, 19 days. K, knob of new material on dorsal side of peristomium. FIG. 5. Head bud induced at tenth segment. Age, 18 days. FIG. 6. Tail bud induced at tenth segment. Age, 22 days. A, partial anal segment; D, dorsal side of bud. FIG. 7. Bud induced at tenth segment. Age, 25 days. A, partial anal seg- ment ; /, exposed part of implant; P, proboscis-like part. FIG. 8. Bud induced at tenth segment. Age, 18 days. A, partial anal seg- ment ; D, dorsal side of bud; P, proboscis-like part. Asterisk marks basal end of line of demarcation between reddish ventral half and lighter colored dorsal half. virtually at the outer end of the implant. The cone in each case, there- fore, apparently grew from the implant. A possible significance of these cones is shown by the remaining two buds, implants 2^4, formed at the tenth segment. One of these buds (Fig. 7) was weakly segmented and terminated in two parts. On the dorsal side was a partial anal segment with about 8 anal cirri. On the. 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
