. Contributions to Canadian biology. Marine biology; Natural history. HYDROIDS OF EASTERN CANADA 143 Genus Syncoryne. Trophosome. Colony nnbranched or slightly branched; tentacles strongly capi- tate. Gonosome. Gonophores producing free medusae with four radial canals and four rudimentary tentacles. ' Syncoryne mirahilis (Agassiz). Trophosome. Colony unbranched or slightly and irregularly branched; hydranth stout; tentacles 15 or more. Gonosome. Gonophores nearly spherical, borne among or below the proximal Family Trophosome. Hydranth with conical or dome-shaped probosci
. Contributions to Canadian biology. Marine biology; Natural history. HYDROIDS OF EASTERN CANADA 143 Genus Syncoryne. Trophosome. Colony nnbranched or slightly branched; tentacles strongly capi- tate. Gonosome. Gonophores producing free medusae with four radial canals and four rudimentary tentacles. ' Syncoryne mirahilis (Agassiz). Trophosome. Colony unbranched or slightly and irregularly branched; hydranth stout; tentacles 15 or more. Gonosome. Gonophores nearly spherical, borne among or below the proximal Family Trophosome. Hydranth with conical or dome-shaped proboscis, surrounded by a single whorl of filiform tentacles. Gonosome. Gonophores producing fixed sporosacs. KEY TO GEXERA. a Sporosacs permanently surrounded by perisarc. h Sporosacs not permanently surrounded by perisarc. Bimeria. Garveia. Genus Bimeria. Trophosome. Colony usually branched, invested with a conspicuous perisarc, which covers the base of the tentacles; hydranths fusiform. Gonosome. Gonophores covered with perisarc throughout the whole period of development. Bbneria hrevis Fraser. Trophosome. Zooids often appearing singly but sometimes as unbranched or slightly branched colonies; 8 mm. in height; branches given off irregularly; peri- sarc wringled but not annulated; creased around the base of the small hydranth; tentacles 11-12. Gonosome. 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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