BRACHIOPODA. 
231 
Genus CONCHIDIUM, Linne. 1753. 
PLATES LXIV, LXV, LXVI, LXVII. 
1753. ConcJiidium, Linne. Museum Tessinianum, p. 90, pi. v, figs. 8, a, b. 
1766. Helmintholitus, Linne. Systema Naturie, ed. xii, vol. iv, p. 163. 
1798. Anomites, Hisinueu. Minerogi-aph. Anmerkning. ofver Gottland ; Vet. Akad. Handling, p. 285. 
1813. Pentamei'us, Sowerbt. Mineral Conchology, vol. i, p. 73, pis. xxviii, xxix. 
1828. Gyjndia, Dalman. Kongl. Vetenskaps Akad. Handlingar, pp. 93, 100. 
1839. Pentamerus, Sowerby. Murchison’s Silni'ian System, p. 615, iil. vi, figs. 8a-e. 
1841. PeMtome»v4,9, Hisingbr. Lethsea Suecica, p. 74, pi. xxi, figs. 10 ci-c. 
1843. Pentamerus, A. Robmer. Die Versteinerungen des Harzgebirges, pi. iv, fig. 16. 
1845. Pentamerus, db Verneuil. G6o 1. de la Russie et des Mont, de I’Oural, vol. ii, pp. 113-118, 
pi. vii, figs. 1-3. 
1850. Pentamerus, A. Robmer. Beitr. zur geolog. Kenntn. der noi-dvvest. Harzgeb., p. 59. 
18.52. Pentamerus, Hall. Palaeontology of New York, vol. ii, p. 341, pi. Ixxix, figs. 1, 2. 
1854. Pentamerus, Davidson. Introd. British Foss. Brach., p. 97, pi. vii, fig. 116. 
1854. Pentamerus, Gruenbwaldt. Memoires Sav. Etrang. Acad. Imp. Sci. St. Petersbourg, vol. vii, 
p. 26, pi. iv, fig. 15. 
1855. Pentamerus, Conrad. Pi-oc. Acad. Nat. Sci. Philadeljihia, vol. vii, p. 441. 
1860. Pentamerus, Lindstrom. Gotland’s Brachiopoden, p. 355. 
1860. Pentamen'us, Emmons. Manual of Geology, p. 107, figure. 
1861. Pentamerus, Billings. Canadian Journal, vol. vi, p. 269. 
1863. Pentamerus, Billings. Geology of Canada, p. 337, fig. 341. 
1867. Pentamerus, Hall. Twentieth Ann. Rept. N. Y. State Cab. Nat Hist., p. 373, pi. xiii, figs. 22-24. 
1867. Pentamarus, Hall. Palaeontology of New Yoi'k, vol. iv, pp. 369-374. 
1867. Pentamen-us, Davidson, British Silurian Brachiopoda, ji. 142, pi. xvi, figs. 1-3; pi. xvii, 
figs. 1-10; pi. xix, fig. 3. 
1871. Antirliynchonella, Pentamerus, (ixi-mSTKOT. PetrefactenkundeDeutschlands; Brachiopoden, p.231, 
Xil. xliii, figs. 36-39. 
1872. Pentamei’us, Hall and Whitfield. Twenty-fourth Ann. Rept. N. Y. State Mus. Nat. Hist., 
pp. 184-186. 
1875. Pentamerus, Hall and Whitfield. Twenty-seventh Ann. Rept. N. Y. State Mus. Nat. Hist., 
pi. X, figs. 1-12. 
1879. Pentamemis, Emerson. Geol. Frobisher Bay; Hall’s Arctic Exped., App. Ill, p. 578. 
1879. Penta7nerus, Barrandb. Systeme Silurien du Centre de la Boheme, vol. v, pi. xx, figs. 9-14; 
pi. xxi, figs. 10-13 ; pi. xxiv, fig. 8 ; pi. Ixxix, figs. 1-3. 
1880. Pe7itamer7is, Angelin and Lindstrom. Fi'agmenta Silurica, p. 24, pl. xx, figs. 1-29. 
1881. Zdimir, Barrandb. Syst^ine Silurien, vol. vi, p. 171, pl. ccxcii, figs. 17-20. 
1882. Pentamerus, Whitfield. Geology of Wisconsin, vol. iv, p. 314, pl. xxiii, figs. 1, 2. 
1886. Gypidia, Ulrich. Contributions to American Palaeontology, vol. i, p. 28, pl. iii, fig. 2. 
1887. Concliidmm, QShlert. Fischer’s Manuel de Conchyliologie, p. 1311, fig. 1097. 
1888. Pentamerus, Novak. Zeitschr. der deutsch. geolog. Gesellsch., vol. xl, p. 588. 
1889. Pentamerus, Nettblroth. Kentucky Fossil Shells, pp. 53, 55, 57, 60, pl. xxvii, figs. 14-16; 
pl. xxviii, figs. 1-8 ; pl. xxix, figs. 1, 2, 17. 
1890. Pentamerus, Gagel. Brach. der camb. und silur. Gesehiebe im Diluv. der Provinz. Ost- und 
Westpreussen, pp. 53, 54, pl. iv, figs. 2-4. 
1891. Pentamerus, Whiteaves. Canadian Record of Science, p. 295, pl. iii, figs. 3, 4. 
1892. Pentamerus, R. Etheridge, Jr. Pentameridae of New South Wales,; Records Geol. Survey 
N. S. W., vol. viii, pt. ii, p. 49, pl. x, figs. 1-8 ; pl. xi, figs. 1-4, 10-12. 
1892. Pentamenis, Miller. Seventeenth Ann. Rept. State Geologist Indiana, p. 687, pl. xiii, figs. 5, 6. 
