. Bulletin - United States National Museum. Science. ie><£;..V + < •©*. Fig. 119.—Genus Posterula Jullien, 1903 A-J. Posterula sarsi Smitt, 1868. A. Frontal face of portion of a colony, X25. B. Operculum in place with its chitinous nucleus enveloped by the oper- cular membrane. C. Operculum isolated. D. Peristomice with its avicularia. (A-D. After Jullien, 1903.) E. Mandible, X250. F. Operculum, X85. G. Mandible, X250. (E-G. After Waters, 1900.) H. Ovicelled zooecia, X25. The ovicells show a more or less well-developed ovicellarian area (after Levinsen, 1909). I. Longitudinal section,
. Bulletin - United States National Museum. Science. ie><£;..V + < •©*. Fig. 119.—Genus Posterula Jullien, 1903 A-J. Posterula sarsi Smitt, 1868. A. Frontal face of portion of a colony, X25. B. Operculum in place with its chitinous nucleus enveloped by the oper- cular membrane. C. Operculum isolated. D. Peristomice with its avicularia. (A-D. After Jullien, 1903.) E. Mandible, X250. F. Operculum, X85. G. Mandible, X250. (E-G. After Waters, 1900.) H. Ovicelled zooecia, X25. The ovicells show a more or less well-developed ovicellarian area (after Levinsen, 1909). I. Longitudinal section, X25, through an ovicelled zoarium. The ovicell is hyperstomial, closed by the operculum, embedded in the tubular wall of the distal zooecium. J. Longitudinal section through a thick colony, X25, showing the arrangement of the tubules. 1908. Escharoides sarsi Robertson, The incrusting Chilostomatous Bryozoa of the west coast of North America, University of California Publications Zoology, vol. 4, p. 301, pi. 22, fig. 66, 67. 1909. Discopora sarsii Levinsen, Morphologic and Systematic Studies on the Cheilostomatous Bryozoa, p. 344, pi. 24, fig. 2 (ovicell). 1912. Discopora sarsi Nordgaard, Bryozoaires de la Campagne arctique de 1907 de Due d'Orldans, p. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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