. Contributions to Canadian biology. Marine biology; Natural history. HTDROIDS OF EASTERN CANADA Genus Clava. 141 Trophosome. Zooids rising singly from a reticular stolon; tentacles numerous, scattered, filiform; proboscis clavate. Gonosome. Gonophores produce fixed sporosacs in clusters a short distance below the proximal tentacles. Clava leptostyla Agassiz. Trophosome. Zooids clustered, 1 cm. in height, constricted at the base; proboscis clavate, tentacles 20-30. Gonosome. Sporosacs spherical, appearing in large clusters just below the proximal No. 2. Clava leptoslyla. Family LAR
. Contributions to Canadian biology. Marine biology; Natural history. HTDROIDS OF EASTERN CANADA Genus Clava. 141 Trophosome. Zooids rising singly from a reticular stolon; tentacles numerous, scattered, filiform; proboscis clavate. Gonosome. Gonophores produce fixed sporosacs in clusters a short distance below the proximal tentacles. Clava leptostyla Agassiz. Trophosome. Zooids clustered, 1 cm. in height, constricted at the base; proboscis clavate, tentacles 20-30. Gonosome. Sporosacs spherical, appearing in large clusters just below the proximal No. 2. Clava leptoslyla. Family LARID^. Trophosome. Zooids rising singly from a reticular stolon; tentacles much reduced in number, very extensile; proboscis fusiform. Gonosome. Gonophores producing free medusae. Genus Monobrachium. Trophosome. Zooids, each with a single tentacle which has great freedom of movement; mouth terminal. Gonosome. Medusa buds grow from the stolon; medusae with four radial canals. Monohrachium parasitum Mereschkowsky. Trophosome. Stolon growing over living mollusc shells; the zooids appear at the hinge of the shell and the network spreads over the surface to the margin, with a number of free ends 3upi)lied with batteries of thread cells, projecting beyond it; proboscis about one-third the length of the whole zooid; tentacle when extended longer than the body of the zooid; zooid 0-Y or 0-8 mm. long, tentacle extended 1 mm. Gonosome. Gonophores grow on short pedicels from stolon, one medusa bud to each gonophore; medusa gloibular, with four radial 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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