. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Orthis aequivalvis. 5 Riii^ufi 5 ex. 5-b 1888, part 2, p. 134, pi. 7, fig. 5, 5 a^ h, c, belonging to the group of 0, iiloba. Lin. (See outline of this as fig. 6); and 0. varica^ Con.; but has a deeper sinus, and a hinge line only half as long. Only two perfect ones yet found; but a sinele valve is sometimes found in the middle and lower divisions of the Niagara shale at Lockport, N. Y. (0. hiloha seems absent here.)—Vh, Hall. Pal. N. Y. Vol. 1, 1847, Tren- '
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Orthis aequivalvis. 5 Riii^ufi 5 ex. 5-b 1888, part 2, p. 134, pi. 7, fig. 5, 5 a^ h, c, belonging to the group of 0, iiloba. Lin. (See outline of this as fig. 6); and 0. varica^ Con.; but has a deeper sinus, and a hinge line only half as long. Only two perfect ones yet found; but a sinele valve is sometimes found in the middle and lower divisions of the Niagara shale at Lockport, N. Y. (0. hiloha seems absent here.)—Vh, Hall. Pal. N. Y. Vol. 1, 1847, Tren- '^0. ton. Emmons, Am. Geol. I, ii, 1855, 196, pi. 9, fig. 6 a, J, c. Shell symmetrica]; more than thirty folds, forking once or twice.—Trenton formation, lie, Orthis bellarugosa. Conrad, Proc. Acad. Nat. Sci. Phila. Vol. 1, 1843, Trenton. Emmons, A. G. I. ii, 1855, 197, pi. 9, figs. 3 a, J, c, d; small shell; back valve with a narrow groove in the middle; folds numerous, forking unequally and scaly (im- bricated). Trenton formation, IIc, Orthis bellula, James. Pal. Ohio, Vol. 1, 1873, p. 103, pi. ^^ I 8, figs. 5 a, natural size, back; 5 5, magni-fied two diam. same; 5 (?, magnified^ ventral; 5 6?,. pf. &,. 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 Lesley, J. P. (J. Peter), 1819-1903; Pennsylvania. Board of Commissioners for the Second Geological Survey. Harrisburg, Board of Commissioners for the Geological Survey
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
