. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Ptycho. 836 plate 5, fi^. 3. ConeGophdlites trilineahcs Ford, 1871,1873,1875, Amer. Jour. Sci. Vol. 2, p. 33; Vol. 6, p. 135; Vol. 9, p. 205.' Conocoryphe, Ford, 1880, Amer. Jour. Sci. Vol. 19, p. 152). Walcott, Bulletin 30, U. S. G. S. page 203, plate 27, %. 1, one of Emmons' original specimens now in Am. Mus. Nat. Hist. N. Y. city; fig. la, 15, enlarged twice, Ford's drawings of speci- mens found at Troy; Ic, copy of Emmons' original figure in Amer. Geol. p
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Ptycho. 836 plate 5, fi^. 3. ConeGophdlites trilineahcs Ford, 1871,1873,1875, Amer. Jour. Sci. Vol. 2, p. 33; Vol. 6, p. 135; Vol. 9, p. 205.' Conocoryphe, Ford, 1880, Amer. Jour. Sci. Vol. 19, p. 152). Walcott, Bulletin 30, U. S. G. S. page 203, plate 27, %. 1, one of Emmons' original specimens now in Am. Mus. Nat. Hist. N. Y. city; fig. la, 15, enlarged twice, Ford's drawings of speci- mens found at Troy; Ic, copy of Emmons' original figure in Amer. Geol. plate 1. fig. 7. Lower Cambrian {Georgian) Con- glomerate limestone beds near Troy ; also below Quebec; also in Washington Co., N. Y. Z. C, Ptycoparia vulcanus. Aa. (Conocephalites vulcanus^ Billings, Tnl ^^^^' ^^^^- ^^' II. 9^2, fig. 7^^*^ 357; Pal. ,,fig. 17; Geol. Vt. 18G3, 286, fig. 296.) Walcott, Bul- I letin No. 30, U. S. G. S. page 1^8, plate 26, fig. 4, compressed spec, from Parker's quarry; fig. 4a, more perfect one from ''Red sandrock " east of Highgate Springs. Lower Cambrian {Georgian) formation, in Vermont. L. C. Ptychophyllum kn^ppi. See page 887. Ptychopteria beeeheri, Hall, Pal. N. Y. Vol. V i. 1884, 143,pl. 85, ^g. 21, an entire , â , eft ,V (â¢,,f)'5". valve ⢠J 22, right valve; somewhat resembles P. trigonalis ; right valve like P. alata, but left valve very unlike it; distinguishing characters, its large rhomboidal form, extreme gibbosity and arcuation of left valve. From Upper Chemung at Warren, Pa. Randall's specimens 9613, 9616, 9617, 9618, 9620, 9621, wrongly labelled Allorisma, TIlLg, Ptychopteria elongata, Hall, Pal. N. Y. Vol. V i, 1884, page 141, pi. 85, fig. 10, hinge view; 11,ventral view; 12, large right valve; 13, left valve of 10; surface marked by fine radi- (Continued on page d38.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
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