(9) 'Memoirs of the Geological Survey of Great Britain,'
(10) 'Reports of the Geological Surveys of the States of New York,
Illinois, Ohio, Iowa, Michigan, Vermont, Wisconsin, Minnesota,'
&c. By Emmons, Hall, Worthen, Meek, Newberry, Orton, Winchell,
Dale Owen, &c.
(11) 'Thesaurus Siluricus.' Bigsby.
(12) 'British Palaeozoic Fossils.' M'Coy.
(13) 'Synopsis of the Silurian Fossils of Ireland,' M'Coy.
(14) "Appendix to the Geology of North Wales"--'Mem. Geol. Survey,'
vol. iii. Salter.
(15) 'Catalogue of the Cambrian and Silurian Fossils in the
Woodwardian Museum of Cambridge.' Salter.
(16) 'Characteristic British Fossils.' Baily.
(17) 'Catalogue of British Fossils.' Morris.
(18) 'Palaeozoic Fossils of Canada.' Billings.
(19) 'Decades of the Geological Survey of Canada.' Billings,
Salter, Rupert Jones.
(20) 'Decades of the Geological Survey of Great Britain.' Salter,
Edward, Forbes.
(21) 'Palaeontology of New York,' vols. i.-iii. Hall.
(22) 'Palaeontology of Illinois.' Meek and Worthen.
(23) 'Palaeontology of Ohio.' Meek, Hall, Whitfield, Nicholson.
(24) 'Silurian Fauna of West Tennessee' (Silurische Fauna des
Westlichen Tennessee). Ferdinand Roemer.
(25) 'Reports on the State Cabinet of New York.' Hall.
(26) 'Lethaea Geognostica.' Bronn.
(27) 'Index Palaeontologicus.
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