. Contributions to Canadian biology. Marine biology; Natural history. HTDROIDS OF EASTERN CANADA 145 Tamily EUDENDRID^. Trophosome. Colony branching, perisarc well developed; proboscis trumpet- shaped but with much freedom of movement; tentacles filiform in a single whorl. Gonosome. Gonophores producing fixed sporosacs; male and female gonophores usually dissimilar; male gonophores in whorls, female gonophores in clusters. Characters as in the family. Genus EUDENDRIUM. KEY TO SPECIES, a Main stem, primary and even secondary branches, fascicled. h Branches and pedicels slightly annulated proxim
. Contributions to Canadian biology. Marine biology; Natural history. HTDROIDS OF EASTERN CANADA 145 Tamily EUDENDRID^. Trophosome. Colony branching, perisarc well developed; proboscis trumpet- shaped but with much freedom of movement; tentacles filiform in a single whorl. Gonosome. Gonophores producing fixed sporosacs; male and female gonophores usually dissimilar; male gonophores in whorls, female gonophores in clusters. Characters as in the family. Genus EUDENDRIUM. KEY TO SPECIES, a Main stem, primary and even secondary branches, fascicled. h Branches and pedicels slightly annulated proximally or pedicels only annulated throughout. E- rameum. hh Branches and pedicels extensively annulated. E. cingulatum. aa Main stem fascicled. c Colony very bushy with branches extremely numerous. E. annulatum. cc Colony not bushy. d Branches and pedicels annulated proximally. E. ramosum. dd Branches and pedicels entirely annulated. E. dispar. laa Stem simple. e Gonophores at the base of hydranths that are not aborted. E. album, ee Gonophores at the base of aborted hydranths. / Branches short and strong. E. capillare. ff Branches if present long; main stem, branches and pedicels tenuous. E. tcnue. Eudendrium album Nutting. Trophosome. Colony minute, 8mm., stem unbranched, or with a few straggling branches; stem, branches and pedicels very slender; annulations indefinite. Gonosome. Gonophores borne at the base of the hydranth, which may be smaller but not entirely aborted; male and female gonophores in small clusters. Colour. Hydranths and female gonophores white; male gonophores pale yellow; hydrocaulus nearly No. 10. Eudendrium album. Eudendrium annulatum Norman. Trophosome. Stem shrubby, covered with a dense network of anastomosing tubes, 10 cm., branches very numerous making the colony look bushy, fascicled in the proximal portion; ultimate branches slender, these and the i>edicels closely annulated through- out. Gonosome. Gonophores clustered at the base of
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