. Bulletin - United States National Museum. Science. 254 BULLETIN 100, UNITED STATES NATIONAL MUSEUM PETRALIA JAPONICA Busk, 1884 Plate 23, figs. 1-3 1909. Lepralia japonica Waters, Bryozoa of the Sudanese Red Sea, Linnean Society Journal, Zoology, vol. 31, p. 149, pi. 13, figs. 10-12. (Bibli- ography, geographic distribution.) 1921. Petralia japonica Marcus, Bryozoen, Results of Swedish scientific expeditions to Australia, Kungl. svenska Vetenskaps-Akademiens Handlinger, vol. 61, No. 5, p. 26, pi. 1, figs. 16, 17; pi. 2, fig. 3. (Bibli- ography.). Fig. 104.—Genus Petralia Levinsen, 1909 A-G.
. Bulletin - United States National Museum. Science. 254 BULLETIN 100, UNITED STATES NATIONAL MUSEUM PETRALIA JAPONICA Busk, 1884 Plate 23, figs. 1-3 1909. Lepralia japonica Waters, Bryozoa of the Sudanese Red Sea, Linnean Society Journal, Zoology, vol. 31, p. 149, pi. 13, figs. 10-12. (Bibli- ography, geographic distribution.) 1921. Petralia japonica Marcus, Bryozoen, Results of Swedish scientific expeditions to Australia, Kungl. svenska Vetenskaps-Akademiens Handlinger, vol. 61, No. 5, p. 26, pi. 1, figs. 16, 17; pi. 2, fig. 3. (Bibli- ography.). Fig. 104.—Genus Petralia Levinsen, 1909 A-G. Petralia japonica Busk, 1884. A. Zoarium, one-half natural size (after Marcus, 1920). B. Zooecia, X20. The lowermost zooecium to the left shows a hollow, from which the whole ovicell has been removed; the uppermost to the right shows on the other, hand an ovicell with the frontal wall removed (after Levinsen, 1909). C. Zooecia, X25, with ovicells and one broken-down ovicell. D. Avicularian mandible, X85. (C, D. After Waters, 1909.) E, F, G. Oper- cula, X85. (E. After Levinsen, 1909. F. Waters, 1909. G. Canu and Bassler.) Zooecia \Lz lz~ = mm. mm. Measurements.— . iha^0A5 mm. Aperture] fe=04()mm Structure.—The poster is wider than the anter; they are separated from each other. On the interior this separation is indicated by two lateral condyles altogether invisible exteriorily. The frontal is a tremocyst supported by a perforated olocyst. The structure of the ovicell is analogous to that of the frontal, but the tremopores are 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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