. Contributions to Canadian biology. Marine biology; Natural history. HYDKOIDH OF EASTERN CANADA 173 Sertularella polyzonim (Liunteus). Trophosome. Stem slender; branching irregularly tilternate; hydrothecae alternate, rather distinct, large, tapering but slightly, the distal half or more, free; margin with four teeth; operculum of four flaps. Gonosome. Gonangia large, oval; margin with four stout spines or teeth; surface strongly and regu- larly No. 87. Sertularella polyzonias. SrHularella nif/osa (Lmiuh'us). Trophosome. Colony small, stem usually un- branched, constricted at regular
. Contributions to Canadian biology. Marine biology; Natural history. HYDKOIDH OF EASTERN CANADA 173 Sertularella polyzonim (Liunteus). Trophosome. Stem slender; branching irregularly tilternate; hydrothecae alternate, rather distinct, large, tapering but slightly, the distal half or more, free; margin with four teeth; operculum of four flaps. Gonosome. Gonangia large, oval; margin with four stout spines or teeth; surface strongly and regu- larly No. 87. Sertularella polyzonias. SrHularella nif/osa (Lmiuh'us). Trophosome. Colony small, stem usually un- branched, constricted at regular intervals; alternate, rather distinct, fusiform, distinctly rugose; margin with four tentacles; operculum with four flaps. Gonosome. Gonangia oval, rugose; margin with four teeth. Serhilarella tricuspidata (Alder). Trophosome. Stem slender, lax, branching irregu- larly alternate or dichotomous; hydrothecae alternate, very slightly immersed, tubular, sometimes curved; margin with three teeth; operculum with three flaps. Gonosome. Gonangia oval, with strongly crested rugosities; a small, smooth tubular neck bears the aper- 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
Size: 1390px × 1798px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
