. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 138 STEPHEN C. BROWN TO RESERVOIR MIRROR. MIRROR TO RESERVOIR TOP VIEW SIDE VIEW OPAQUE MASK 7 DIFFUSER X LIGHT SOURCE FIGURE 2. Observation chamber; see text for details of construction. FIGURE 3. End view of observation chamber showing optics of system. differentiated in 1% osmium tetroxide. Dissections were performed with the aid of a Bausch and Lomb stereomicroscope. RESULTS Skeletomusculatiire As in all annelids, the functional skeleton of Chactopterus is hydrostatic. Coelomic fluid occupies an estimated 85% of the volu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 138 STEPHEN C. BROWN TO RESERVOIR MIRROR. MIRROR TO RESERVOIR TOP VIEW SIDE VIEW OPAQUE MASK 7 DIFFUSER X LIGHT SOURCE FIGURE 2. Observation chamber; see text for details of construction. FIGURE 3. End view of observation chamber showing optics of system. differentiated in 1% osmium tetroxide. Dissections were performed with the aid of a Bausch and Lomb stereomicroscope. RESULTS Skeletomusculatiire As in all annelids, the functional skeleton of Chactopterus is hydrostatic. Coelomic fluid occupies an estimated 85% of the volume within each piston seg- ment, with intestine, nephridia, and gametes making up the balance. There is good anatomical evidence (Joyeux-Laffuie, 1890; Enders, 1909; Meissner, 1935) that the coelomic fluid contained within each piston segment is completely isolated, and my own experience with dye and fixative injection, or fluid removal, is con- sistent with this view. Likewise, there were no indications during the present study that the volumes of the piston segments varied during pumping 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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