. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Cocoon. Cftteltam. S/ime fu6e. FIG. 2. ; , 3. Forty-two anterior segments of a worm caught with a nearly mature cocoon around its clitellum. Before being dropped into boiling water, the worm partly withdrew from the cocoon, leaving it encircling the i6th-iSth segments. The cocoon and segments are very much contracted, the cocoon appearing as a narrow, opaque band around the worm. Such cocoons regain the typical oblong shape when removed from the worm. The worm has partly withdrawn from the slime-tube, leaving the anterior en
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Cocoon. Cftteltam. S/ime fu6e. FIG. 2. ; , 3. Forty-two anterior segments of a worm caught with a nearly mature cocoon around its clitellum. Before being dropped into boiling water, the worm partly withdrew from the cocoon, leaving it encircling the i6th-iSth segments. The cocoon and segments are very much contracted, the cocoon appearing as a narrow, opaque band around the worm. Such cocoons regain the typical oblong shape when removed from the worm. The worm has partly withdrawn from the slime-tube, leaving the anterior end projecting beyond its head. extension of the worm, when dropped into boiling water, possibly causes such change in the position of the slime-tube, as shown in Fig. i. On the other hand, we have no proof that the contractions of the worm when captured do not result in an extension of the tube beyond the point covered under normal conditions, and that in the living worm the tube does not reach the spermathecal segments. In living worms, we have seen the slime-tube, in some cases, stop short of these segments, in others, completely cover them, but it is impossible to affirm which condition pre- vails when the worm is at rest. Fig. 3 shows a tube with its posterior limit clearly indicated, by the impress of five seg- ments posterior to the clitellum. A comparison with Fig. I shows that the slime-tube in the captured worm stops short of this point. Our method of securing cocoons in the process of formation. 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 Biol
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