. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 368 ROBERT ROBERTSON. 29 FIGURES. 21-29. Boonca scininuda spermatophores from North Carolina (host: Argopcctcn irradians). Figure 27 shows two stuck together by their stalks. Spermatozoa are seen emerg- ing only on Figures 24 and 27. peratures (> 20° C.) than in the field (15°-17° C.) and were abnormally crowded in a bowl in the laboratory. They may, therefore, have been transferring sper- matophores at an unusually high rate. Remarks. At Woods Hole, spermatozoa perhaps are stored over winter by the recipients (as in B. b
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 368 ROBERT ROBERTSON. 29 FIGURES. 21-29. Boonca scininuda spermatophores from North Carolina (host: Argopcctcn irradians). Figure 27 shows two stuck together by their stalks. Spermatozoa are seen emerg- ing only on Figures 24 and 27. peratures (> 20° C.) than in the field (15°-17° C.) and were abnormally crowded in a bowl in the laboratory. They may, therefore, have been transferring sper- matophores at an unusually high rate. Remarks. At Woods Hole, spermatozoa perhaps are stored over winter by the recipients (as in B. bisiitiiralis). Animals spawned the preceding summer and with shells less than mm long produced spermatophores by mid-October, , when they were only about 3 months old. A specimen with a shell mm long was ob- served to extrude a spermatophore bulb end first, indicating maturity even at this small 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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