. Contributions to Canadian biology. Marine biology; Natural history. 160 DEPAttTME^'T OF THE NAVAL SERVICE Ohelia geniculata (Linnaeus). Trohphosome. Stem simple, geniculate, 25 mm. high, hearing alternate pedicels on shoulder processes of the internodes; hydrotheca as wide as deep; margin entire; pedicels annulated at each end or throughout, usually curved away from the stem. Gonosome. Gonangium axillary, oval or slightly obovate; terminal collar present. Ohelia hyalina Clark. TropJiosome. Stem 20mm. high, unbranched or occasionally branched, geniculate, with several annu- lations above the
. Contributions to Canadian biology. Marine biology; Natural history. 160 DEPAttTME^'T OF THE NAVAL SERVICE Ohelia geniculata (Linnaeus). Trohphosome. Stem simple, geniculate, 25 mm. high, hearing alternate pedicels on shoulder processes of the internodes; hydrotheca as wide as deep; margin entire; pedicels annulated at each end or throughout, usually curved away from the stem. Gonosome. Gonangium axillary, oval or slightly obovate; terminal collar present. Ohelia hyalina Clark. TropJiosome. Stem 20mm. high, unbranched or occasionally branched, geniculate, with several annu- lations above the origin of each pedicel; hydrotheca as wide as deep; margin entire, sometimes flaring; pedicels annulated at each end or throughout. Gonosonve. Gonangium axillary, obovate, with or without terminal collar. Ohelia longissima (Pallas). Trophosome. Stem filiform of great length, 60 cm., much branched, branches alternate; stem horn colour or black, annulated at base and above each node; hydro- theca deeper than wide; margin wavy or with low, rounded teeth; pedicel annulated at each end or throughout. Gonosome. Gonangium axillary, oval, with a dis- tinct collar, pedicel No. 49. Obelia 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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