. Contributions to Canadian biology. Marine biology; Natural history. 162 DEPARTMENT OF THE NAVAL SERVICE Opercularella lacerata (Jolinston). Trophosome. Stem short, 25 mm., branched, some of the branches being almost as long as the main stem; stem and branches flexuous, annulated throughout; hydrotheca with proximal half oval,' distal half conical; no distinct margin; segments of the operculum long and slender. Gonosome. Female gonangia obovate, sessile or on short, annulated pedicels, axillary or in place of hydro- thecae; male gonangia No. 55. \ Opercularella lacerata. Operculare
. Contributions to Canadian biology. Marine biology; Natural history. 162 DEPARTMENT OF THE NAVAL SERVICE Opercularella lacerata (Jolinston). Trophosome. Stem short, 25 mm., branched, some of the branches being almost as long as the main stem; stem and branches flexuous, annulated throughout; hydrotheca with proximal half oval,' distal half conical; no distinct margin; segments of the operculum long and slender. Gonosome. Female gonangia obovate, sessile or on short, annulated pedicels, axillary or in place of hydro- thecae; male gonangia No. 55. \ Opercularella lacerata. Opercularella pumila Clark. Trophosome. Stem erect or creeping, sparingly branched, annulated throughout; hydrotheca3 similar in shape to those of 0. lacerata but smaller. Gonosome. Gonangia fusiform on short annalated pedicels on the stem or 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 Biological Board of Canada; Canada. Marine Biological Station. Toronto, Biological Board of Canada
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