. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Microdiscus dawsoni, (Hartt, in Acad. Geol.) Walcott, Bulletin, U. S. G, S. No. 10, page 23, pi. 2, fig. 3, head shield enlarged three times ; fig. 3 a, tail shield enlarged three times.— Middle Camhrian {Saint John) New Brunswick, M, C. Microdiscus lobatus. {Agnostus lohatus^ Hall, 1847, Pal. ^ N. Y. Vol. 1, p. M^e. J Jl^ 'l^ P»' i6 258, pi. 67, figs. 5^. —f.) Ford, 1873, Amer. Jour. S.[3.] vi,135, foot note.— Walcott, Bull. U. S. G. S. No. 30, page J56, pla
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Microdiscus dawsoni, (Hartt, in Acad. Geol.) Walcott, Bulletin, U. S. G, S. No. 10, page 23, pi. 2, fig. 3, head shield enlarged three times ; fig. 3 a, tail shield enlarged three times.— Middle Camhrian {Saint John) New Brunswick, M, C. Microdiscus lobatus. {Agnostus lohatus^ Hall, 1847, Pal. ^ N. Y. Vol. 1, p. M^e. J Jl^ 'l^ P»' i6 258, pi. 67, figs. 5^. —f.) Ford, 1873, Amer. Jour. S.[3.] vi,135, foot note.— Walcott, Bull. U. S. G. S. No. 30, page J56, plate 16, fig. 1, head very much enlarged; 1(Z, another head, to show range of variation; Ih tail (pygi- dium) very 'much enlarged,—Found in the Low. Camlrian (Georgian) formation,—multitudes of them occurring in the conglomerate limestone on the ridge east of Troy, N. Y.—Note. Formerly considered characteristic of Hudson river slate forma- tion. See Agnostus lohatus., above. L. C. Eogers, page 820, fig. 614. {Beyrichia lolata.) Middle Cam- ^M^^ brian. (Formerly considered a Hudson river (Loraine) formation species (III b.) Described as a Beyrichia, but it is a trilobite. Figs. 1 n ^^s//:|A show the natural size, figs. 2, enlarged. Microdiscus meeki, (Ford, Am. J. S. [3] xi, 371.) Wal- ^ cott. Bull. U. S. G. S. No. 30, page 155, plate 16, ^ fig. 4, head (drawn by S. W. Ford) this, the only specimen found, necessarily stands as the type of the species; Lower Camhrian conglomate limestone in ridge east of Troy, N. Y.—L. C. Microdiscus parkeri, Walcott, Bulletin, U. S. G. S. No. 30, plate 16, fig. 2 and 2(^5, head and tail, enlarged Hve times.— Georgian i^ formation ; Parker's Trilobite quarry, north of Georgia Plains, Franklin Co., Vermont.—Z. 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 w
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