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62 BULLETIN 96, UNITED STATES NATIONAL MUSEUM. Genus WATERSIPORA Neviani, 1895. 805. Watcrsipora Neviani, Briozoi iieozoici di alcune localita d' Italia, BoUetino della Societa Koiuaua per gli Studi Zoologici, i^t. 2, vol. 4, p. 231. The operculum is membranous or very slightlj'' chitinous on the borders; it exhibits a chitinous axial band of a brown color marking out from the rest of the operculum two lateral spaces which are clearer and which correspond to the two powerful cardelles borne by the zocecial orifice. The frontal is a tremocyst. Genotype.— Watersipora {Lepral'ia) cucullata (Busk, 1853), va- riety labiosa Calvet, 1903. Range.—Helvetian-Eecent. One new species in the Upper Jack- sonian. Family TUBUCELLARIIDAE Busk, 1884. The zooecia have no spines ; their frontal is formed of long tremo- cystal tubules surmounting a thin perforated olocyst. The septulae are numerous, scattered, and multiporous. The ovicell is peristomiale, being formed by a great expansion of the peristomie which is always very long. compensatrix. The frontal bears an ascopore opening into the The zoarium is free, unilamellar, bilamellar, or cylindrical. It is often articulated and radicellated. The articulated zoarium generally lives among algae, the mobility and flexibility of which it must share. Kcij to genera. Zoarinm articulated. No avicularia TnhuecUaria. Zoarium. fixed, hiamellar. Avicularia very rare TuhueeUa. Zoarium unilamellar. Avicularia on each zooecium Tiihiporclla. Genus TUBUCELLARIA D'Orbigny, 1852. 1852. TnbuecJlarut D'Orbigny, Paleoutologie francaise, Terrain Cretace, vol. 5, p. 335. The zoarium is articulated and radicellated. The operculum is sim- ple and separable. No vestibular arch, no avicularia. Genotype.—Tubucellaria {Cellaria) cereoides Ellis and Solander, 1786. Range.—Lutecian—Recent. Four new species in the Eocene and Oligocene of America. TUBUCELLA, new^ genus or subgenus. The zoarium is free, bilamellar. firmly attached, rigid. The avicularia are very rare. The peristomiale is equal to the frontal. Genotype.—Tubucella {Eschara) mamillaris Milne-Edwards, 183C. Range.—Lutecian-Jacksonian.
EARLY TERTIARY CHEILOSTOME BRYOZOA. 63 TUBUCELLA MONILIFERA, new species. Plate 5, fig. 9. Description.—The zoarium is free ; the two lamellae are placed back to back and intimately joined; the fronds are broad, compressed, distorted, and branching. The zooecia are much elongated, fusiform, little distinct, surrounded by a collar of large pores ; the frontal and the peristomiale are of equal length, separated by the ascopore and perforated with small hexagonal pores. The peristome is salient, thick, oblique. The avicularia are very rare, large, transverse, ellip- tical, with two denticles for a pivot. Measurements.— Locecia\ , „ „„ ^ ry . fZ3=^0.90-1.00 mm. [ fo=0.32 mm Yariations.—The zooecia are very constant in their exterior aspect. The larger pores surround the peristomiale and are three times larger than the others. Certain fronds bear some zooecia, closed, not by the oloc_yst, but by the tremocyst, the tubules of which have encroached upon the peristome. The physiological function of these zooecia is unlaiown. The avicularia are scattered, are very large, and form a very large frontal, the origin of which is one of the lateral pores of the peristomiale. Occurrence.—Middle Jacksonian: Wilmington, North Carolina (common). Eutaw Springs, South Carolina (rare). Type.—Cd±. No. 62605, N.S.N.M. Genus TUBIPORELLA Levinsen, 1909. 1909. TuhiporeJla TvEvinsen, Jlorphological and Sy.stematic Studies on the Cheilostomatous Bryozoa, p. 204. A membranous opercular valve. A vestibular arch ; each zocecium with one or two avicularia at the height of the ascopore. The colony occurs as a free foliaceous expansion, with a single layer of zooecia (Levinsen). Genotype.—Tubiporella {Lepralia) magnirostris MacGillivray, 1882. Range.—Miocene-Recent. Family CATENICELLIDAE Busk, 1852. CATENICELLA SUBSEPTENTRIONALIS. new species. Plate 5, fig. 5. The Catenicellidae are bryozoa peculiar to the southern hemis- phere. They abound in the recent seas off Australia, and their fossil
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ADVERTISEMENT. The scientific publi
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PREFACE. Since 19vU the junior auth
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Bulletin - United States National Museum - Smithsonian Institution

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