. Contributions to Canadian biology. Marine biology; Natural history. No. 81. Diiihasia rosacea. Diphasia tamarisca (Linna-us). Trophosome. Stem, branches and hydrotheciP very stovit; hydrothecae sub-opposite, nearly one-half free; three low elevations are present on the margin. Gonosome. Gonangia both male and female wit^^ one diameter greater than the other, obovate, spiny, the female with lobes forming coarse serrations as well, the two distal lobes mixch elongated. Genus No. 82. Diphasia tamarisca. Trophosome. Hydrothecae in groups on the side of the branches, their bases in
. Contributions to Canadian biology. Marine biology; Natural history. No. 81. Diiihasia rosacea. Diphasia tamarisca (Linna-us). Trophosome. Stem, branches and hydrotheciP very stovit; hydrothecae sub-opposite, nearly one-half free; three low elevations are present on the margin. Gonosome. Gonangia both male and female wit^^ one diameter greater than the other, obovate, spiny, the female with lobes forming coarse serrations as well, the two distal lobes mixch elongated. Genus No. 82. Diphasia tamarisca. Trophosome. Hydrothecae in groups on the side of the branches, their bases in line but the distal ends curved alternately to right and left; operculum of one adcauline flap. Gonosome. Gonangia without spines or internal marsupium. HydraUmania falcata (Linnaeus). Trophosome. Colony long and slender; main branches spirally arranged and of much the same length; hydrothecae tubular or very slightly urceolate, arranged in a row on one side of the branch, bases in line, distal portions turned alternately to right and left, five or six to an internode. Gonosome. Gonangium oval, with tubular neck, smooth or with indistinct longitudinal lines. No. 83. HydraUmania falcata. Genus Selagixopsis. Trophosome. Hydrothecae arranged in more than two longitudinal rows, at least on the branches. Gonosome. Gonangia oval or obovate, smooth or neai'ly 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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