. Bulletin - New York State Museum. Science. 1/2 NEW YORK STATE MUSEUM Genus polypora McCoy [Ety.: TtoAu?, many; -opo^^, pore] (1845. Synopsis Carbon, foss. Ireland, p. 206) Zoarium as in Fenestella, but with from two to eight rows; of zooecia on a branch, and without median keel, but sometimes with a row of strong nodes or tubercles. Polypora incepta Hall (Fig. 73) (1852. Pal N. Y. 2:167, P^- 40D, fig. 5a-f) Distinguishing characters,. Funnel-shaped, but generally compressed form; branches dividing somewhat regularly, sometimes anastomosing; dis- sepiments at regular intervals, slender, scarc
. Bulletin - New York State Museum. Science. 1/2 NEW YORK STATE MUSEUM Genus polypora McCoy [Ety.: TtoAu?, many; -opo^^, pore] (1845. Synopsis Carbon, foss. Ireland, p. 206) Zoarium as in Fenestella, but with from two to eight rows; of zooecia on a branch, and without median keel, but sometimes with a row of strong nodes or tubercles. Polypora incepta Hall (Fig. 73) (1852. Pal N. Y. 2:167, P^- 40D, fig. 5a-f) Distinguishing characters,. Funnel-shaped, but generally compressed form; branches dividing somewhat regularly, sometimes anastomosing; dis- sepiments at regular intervals, slender, scarcely thickened at their junction with branches;, fenestrules oblong, quadran- gular, rarely oval; non-celluli- ferous face longitudinally striate; three or four rows of "Ti '^^ "!\ 1 v^iS "li ^^^^ apertures, oval and alter- nating; dissepiments thinner on celluliferous than on non- celluliferous face; sometimes- expanding at the junction with the branches; non-cel- luliferous face indistinguish- Fig. 73 Polypora incepta with non-eelluliferou8 and , ^ ^ t^ i i celluliferous faces enlarged able from r enestclla. Found abundantly in the Bryozoa beds of the Rochester shale at Niagara, and the talus of the clifif above Lewiston hights. Also in. the shale at Lockport (Hall). Genus helopora Hall [Ety.: fiXu^, nail; -opo^, pore] (1852. Pal N. Y. 2:44) Zoarium bushy, dichotomously branching, the whole consisting" of numerous slender, equal segments, united by terminal articula-. â 4-^^. 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; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
