A MONOGRAPH 



BRITISH FOSSIL BRACHIOPODA. 



THOMAS DAVIDSON, LL.D., F.R.S., F.L.S., F.G.S., 



VICE-PEESIDENT OF THE PAL^ONXOGEAPHICAL SOCIETY; MEMBER OF THE GEOLOGICAL SOCIETIES OF FRANCE, BELGIUM, 



EDINBURGH, GLASGOW, AND OP CORNWALL; FOREIGN MEMBER OF THE PROVINCIAL INSTITUTE OF FRANCE; OF THE 



LINNEAN SOCIETY OF NORMANDY; CORRESPONDING MEMBER OF THE IMPERIAL ACADEMY OF SCIENCES OF ST. 



PETERSBURG; OF THE IMPERIAL MINEEALOGICAL SOCIETY OF ST. PETERSBURG; OF THE IMPEKIAl SOCIETY 



OF NATURALISTS OF MOSCOW; OF THE ROYAL ACADEMIES OF BELGIUM AND BAVARIA; OF THE ROYAL 



SOCIETY OF HOLLAND, HAARLEM; OF THE ROYAL SOCIETY OF LIEGE; OF THE ACADEMY OF ST. 



LOUIS; OF THE AMERICAN PHILOSOPHICAL SOCIETY, PHILADELPHIA; OF THE INSTITUTE OF 



ALBANY, UNITED STATES ; OF THE ZOOLOGICAL SOCIETY OF VIENNA ; OF THE PAL^ONTO- 



GEAPHICAL SOCIETIES OF BELGIUM AND OF SWITZERLAND; OF THE MALACOLOGICAL 



SOCIETY OF BELGIUM; HON. MEMBER OF THE GEOLOGISTS' ASSOCIATION, 



LONDON ; OF THE DUDLEY AND MIDLAND GEOLOGICAL AND SCIENTIFIC 



SOCIETY; OF THE NATURAL HISTORY SOCIETY OF GLASGOW; AND 



OF THE YORKSHIRE PHILOSOPHICAL SOCIETY, ETC. ETC. 



VOL. V. 



PART I. 

 DEVONIAN AND SILURIAN SUPPLEMENTS. 



Pages 1—134; Plates I— "VII. 



LONDON : 

 PRINTED FOR THE P AL^O NTOG-R APHIC A L SOCIETY. 



1882. 



