BRACHIOPODA. 241 



Genera (l)BARRANDELLA, nom. propos. ; (2) P E N T A M E R E L L A, 

 Hall, 18o7; (3) SIEBERELL A, (Ehlert, 1887; (4) GYPIDUL A, 

 Hall, 1867. 



PLATES LXXI, LXXII. 



(3) 1827. Atrypa, Dalman. Kongl. Vetenskaps. Acad. Handlingar, p. 180. 



(3) 1834 Terebratula, von Buch. Uebei' Terebi-ateln. 



(3) 1839. Atrypa. J. de C. Sowkrby. Silurian System, jil. xii. fig. 4. 



(1) 1839. Atrypa, J. de C. Sowerbt. Silurian System, pi. xiii, fig. 8. 



(2) 1841. Atrypa, Conrad. Geol. Survey N. Y. ; Ann. Rept. Palseont. Dept., p. 55. 



(3) 1S43. Terebratula, A. Roemer. V'erstein. des Harzgebirges, p. 19, pi. xii, fig. 25. 



(3) 1845. Pentamerns, de Vernkuil. Geologie de la Ru.ssie, etc , vol. ii, p. 120, pi. viii, figs. 'ia-g. 

 (I) 1818. PentameriLS, Davidson and dk Vernkuil. Bull. Soc. Geol. de France, second .ser., vol. v, 



pp. 333, 346 



(4) 1852. Atrypa, Owkn. Geol. Survey Wisconsin, Iowa ami Minnesota, p. 583, pi. iiiA, tig. 4. 



(1) 1852. Pentamerus, Hall. Paleontology of New York, vol. ii, y. 81, pi. xxiv, tigs. 1 a-d. 



(2) 1857. Pentameras, Ki.LL. Tenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 120, tigs. 1-10. 

 (1) 1857. Petitainerun, Billings. Rept. Piog. Geol. Survey of Canada, p. 29(5. 



(3) 1857. Pentamerits, Hall. Tenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 105, tigs. 1-3. 



(t) 1858. Pentamerus, K. Schmidt. Silur. Format. Rsllands ; Archiv fiir Naturkunde, vol. ii, p. 212. 



(4) 1858. Pmtaiiierux. Hall. Geology of Iowa, vol. i, pt. 2, p. 514, pi. vi, figs. 2 a-c. 



(3) 1859. Pentaiiurua, Hall. Palajontology of New York, vol. iii, p. 257, pi. xlvi, tigs. I a-z ; pi. xlvii, 



tigs. 1 a-m. 



(3) 1859. PentameriU!, von Eichwalu. Lelhaea rossica, vol. i, pi. xxxv. tigs. 19, 20. 



(1) 1860. Pentame)-us, Lind,str6ji. Ofversigl kongl. Veten. Acad. Forhandl., p. 365, pi. xii, tig. 6. 



(2) 1860. Pentamerus, Spirifer, Hall. Thirteenth Ann. Rept, N. Y. State Cab. Nat. Hist., pp. 86, 90. 



(3) 1860. Pentamerus, F. Roemkr. Silur. Fauna des westl. Tennessee, p. 73, pi. v, fig. 11. 

 (1) 1861. Pe«ia(ftCT?i.s, Hall. Rept. Pi-ogre^s Geolog. Survey Wisconsin, p. 2. 



(1) 1863. PertinMerii-s, Billings. Geology of Canada, p. 316, fig. 327. 



(3) 1865. Pentamerus, Winchell and Marcy. Mem, Boston .Soc. Nat. Hist., vol. i, p. 94, pi. ii, tig. 11. 

 (1) 1866. Pe«/ame?'?<5, Billings. Catalogue Silurian Fos.sils Anlicosti, p. 45. 



(4) 1866. Pentamerus, Meek and Worthen. Geol. Survey Illinois, vol. ii, p. 325. 



(1) 1867. Peutamtrus, Davidson. British Siluiian Brachiopoda, p. 149, pi. xvii, tigs. 11-14. 



(1) 1867. Pentaintrus (Pcntaiiterella), Hall. Twentieth Ann. Rept. N. Y. Stat<' (^ab. Nat. Hist., 



p. 374, pi. xiii, tigs. 18-21. 



(2) 1867. Pentamerella, Hall. Paheontology of New York, vol. iv, pp. 373, 375-379, pi. Iviii, 



figs. 1-21, 24-43. 



(3) 1:67. Pentaiuerus, Davidson. British Silurian Brachiopoda, p. 145, pi. xv, figs. 13-23. 



(4) 1867. Gypklula, Hall. Paleontology of New Y'ork, vol. iv, pp. 373, 380, 381, pi. Iviii, figs. 22, 23 ; 



\i\. Iviii a, figA. 1-8. 

 (4) 1868. Pentamerus, Meek and Worthen. Geological Survey of Illinois, vol. iii, pp. 428, 429, pi. xiii, 



tigs. 5, 6. 

 (1) 1871. Pentamerus, Quenstedt. Pelrefactenkunde Deutschlands ; Brachioiioden, p. 222, pi. xliii, 



figs 44, 45. 

 (1) 1875. Pentamerus, Hall aiul Whitfield. Paleontology of Ohio, vol. ii, p. 13S, pi. vii, tigs. 7, 8. 



(3) 1878. PentameriLS. Kaysbr. Abhandl. zur geol. Specialkarte von Preussen, etc.. Bud. 2, Heft 4, 



pp. 156-159, pi. xxvii, figs. 1-9, 13. 



(4) 1878. Gypldula, Calvin. Bull. U. S. Geol. Survey of the Terr., vol. iv, p. 730. 



(1) 1S70. Pe?i/rt»ifr«s, CTormffa, Barkande. Sysleme Silurien, vol. v, pis. xxii, xxiv, cxix, cxxxviii. 



