. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 3b. 3d furnace, Orbisonia (000, p. 205, spec. 602-3). But, in Tioga Co. Sherwood's spec. 854-10, was got from Upper Chemung strata^ and assigned to this species by 0. B. Simpson, 1889. If this determination be correct, then this species in Pennsyl- vania ranges from Lower Helderierg up to Chemung. VI to Vlllg, Rhynchonella anticostiensis, Billings, Pal. Foss. Vol. 1, Ui h^^Ak ^ jUl^^^ ^^^^- Geol. Canada, IS'-S, page 211, fig. 212, a^ dorsal valve; 5, sid
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 3b. 3d furnace, Orbisonia (000, p. 205, spec. 602-3). But, in Tioga Co. Sherwood's spec. 854-10, was got from Upper Chemung strata^ and assigned to this species by 0. B. Simpson, 1889. If this determination be correct, then this species in Pennsyl- vania ranges from Lower Helderierg up to Chemung. VI to Vlllg, Rhynchonella anticostiensis, Billings, Pal. Foss. Vol. 1, Ui h^^Ak ^ jUl^^^ ^^^^- Geol. Canada, IS'-S, page 211, fig. 212, a^ dorsal valve; 5, side view; c^ ventral valve. Hud- son river (Loraine) formation in the Gulf of St. Lawrence. /// 5. Rhynchonella bidens ? Terehratula Udentata^ Dalman, y/CL, Clinton, -i^ Hisinger, etc.; T. decemplicata, MnrGhison^ Si\. Syst.; Atripa hidens, Hall. Pal. N. Y. Vol. 2, 1852, page 69, plate 23, figs, a, J, ventral valve of two specimens of diff'erent age; c, dj front and profile of the larger one; from the Clinton at Lockport, N. Y. This species closely resembles the much older Trenton species Atrypa dentata^ differing from it in having a shallower sinus, less raised in front, and in having 5 or more folds on each side, instead of 4. ' '' They may readily be confounded on casual ; (Hall.) In Pennsylvania, doubtfully recog- nized by O. E. Hall, among his collections at McKee's fossil ore bank, Ferguson Valley, Mifflin Co., in shales over the ore bed. (000, p. 104, spec. 501-37.) Va. Rhynchonella brevirostris, Hall. {Terehratula Irevi- yj, 324 rostris^ Sowerby, 1839.) Pentamerushrevirostris^ Sowerby, 1839, S. A. Miller.) Geol. Canada, 1863, page 315, fig. 324. Niagara limestone. Vh. Rhynchonella camura, Hall. Figure given in Geology of V 322 . Canada, 1863, page 315, fig. 322, as from the'strata beneath the Niagara limestone of Upper Canada. Clinton. V Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
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