. Annual report of the Regents. New York State Museum; Science. Gexeka of the Xorth American Palaeozoic Bryozoa. 553 Tkopiddpora, Hall. (Report of N. Y. State Geologist for 1886, Expl. pi. 25. 1886.) Type, Tropidopora nana, Hall. (Plate 16, figs. 1,2.) Zoarium minute, ramose; cell apertures arranged in irregular longitudinal rovvs, separated by sinuous ridges; peristomes very thin, slightly elevated. It has been impossible to determine the internal character of this genus, but the external characters are so different from other Trematoporoid forms, that there here seems a necessity for a new g
. Annual report of the Regents. New York State Museum; Science. Gexeka of the Xorth American Palaeozoic Bryozoa. 553 Tkopiddpora, Hall. (Report of N. Y. State Geologist for 1886, Expl. pi. 25. 1886.) Type, Tropidopora nana, Hall. (Plate 16, figs. 1,2.) Zoarium minute, ramose; cell apertures arranged in irregular longitudinal rovvs, separated by sinuous ridges; peristomes very thin, slightly elevated. It has been impossible to determine the internal character of this genus, but the external characters are so different from other Trematoporoid forms, that there here seems a necessity for a new genus. Family Bactroporidae. Baotkopora, Hall. (Pal. N. Y., Yol. YI, p. 19;^. 1887.) Type, Baetropora granistriata, Hall. (Plate 16, figs, 13, 14.) Zoarium simple, unbranched, lower extremity pointed, striated; external and internal characters very similar to Rhombopoka, but it can not be placed in the family RnoMBOPORioiE, on account of its simple form and pointed, striated base. JSematopora., Ulrich. (Geol. Sur. 111., Yol. YIII, p. 401. 1890.) Type, N'ematopora quadrata, Ulrich. " Zoarium ramose, very slender; continuous above the pointed basal extremity; cells subtubular, short; arranged in a radial. Fig. ItZ. Xematopora quadrata, natural size and xlS. Fig. 12:3. A vertical section, xl8. Fig. X. delicatula. A frond, natural size and xl8. Fig. A transverse section, x50. 70. 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 New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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