. Annual report of the Regents. New York State Museum; Science. Genera of the Xorth Americax Palaeozoic Bryozoa. 551 ISiKhii. ^, Ulrich. (Geol. Sur. 111., Vol. YIII, p. 103. 1890.) Type, Sty^eblotryjpa NickeUi^ Ulrich. (Plate 19. figs. 14, 15.) The internal and external characters of this genus are very similar to those of Rhombopora, but between the ends of the cell apertures are one or more angular pits, and in the peripheral intercellular space mesopores instead of "spiniform ; Callotrypa, Hall. (Pal K Y., Vol. YI, p. 2^. 1887.) Type, Callotrypa macrojpora^ Hall. (Pl
. Annual report of the Regents. New York State Museum; Science. Genera of the Xorth Americax Palaeozoic Bryozoa. 551 ISiKhii. ^, Ulrich. (Geol. Sur. 111., Vol. YIII, p. 103. 1890.) Type, Sty^eblotryjpa NickeUi^ Ulrich. (Plate 19. figs. 14, 15.) The internal and external characters of this genus are very similar to those of Rhombopora, but between the ends of the cell apertures are one or more angular pits, and in the peripheral intercellular space mesopores instead of "spiniform ; Callotrypa, Hall. (Pal K Y., Vol. YI, p. 2^. 1887.) Type, Callotrypa macrojpora^ Hall. (Plate 18, figs. 8-14.) Zoarium ramose solid; cells arising from an imaginary axis at the center of the branch; cell apertures oval, irregularly dis- posed; peristomes equally elevated; interapertural space occu- pied by angular pits; sometimes there are also more or less prominent spines; peripheral intercellular space occupied by mesopores and spiniform tubuli. The internal structure of this species is almost identical with SiRtBLOTRYPA, but it differs from that genus in having the cell aper- tures irregularly disposed and entirely surrounded by the meso- pore apertures. Byjhopora, Miller and Dyer. (Cont. to Pal., ISTo. 2, p. 6. 1879.) Type, Bythopora fruticosa, Miller and Dyer. '•Dendroid, branches small, sometimes anastomosing; smooth; cell apertures longer than wide; separated by impressed ; 120. S^ "^^ IJL. 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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