. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 110 MARTIN W. JOHNSON TABLE I Nereis vexillosa. The seven oldest specimens from cultures set up at Friday Harbor, June 28, 1941 Date killed or found dead 1942 Number of segments Approximate length when moderately relaxed April 25 128 8 cm. May 18 109 5 cm. May 26 109 cm. May 26 107 cm. May 29 119 cm. June 10 105 7 cm. July 28 125 10 cm. None of the specimens showed any indication of entering the heteronereis phase. In this respect they differ from Platynereis agasszi, several of which were found to enter this pha
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 110 MARTIN W. JOHNSON TABLE I Nereis vexillosa. The seven oldest specimens from cultures set up at Friday Harbor, June 28, 1941 Date killed or found dead 1942 Number of segments Approximate length when moderately relaxed April 25 128 8 cm. May 18 109 5 cm. May 26 109 cm. May 26 107 cm. May 29 119 cm. June 10 105 7 cm. July 28 125 10 cm. None of the specimens showed any indication of entering the heteronereis phase. In this respect they differ from Platynereis agasszi, several of which were found to enter this phase near the end of the first year. SPAWNING HABITS While culturing the larvae at Friday Harbor in 1941 a watch was kept for spawning adults in the bay. Finally from isolated small, spawning heterjpereids there was obtained several masses of eggs. These spawners proved to be Nereis. 10 FIGURES 8-10. Nereis vexillosa. FIGURE 8. Heteronereized female parapodium, middle portion of posterior body. FIGURK 9. Heteronereized female parapodium, fourth from last segment. FIGURE 10. Dorsal cirrus, heteronereized male parapodium. (Figures 8, 9, 10 camera lucida drawings to same scale.). 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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