—_— 
A MONOGRAPH 
OF THE 
BRITISH FOSSIL BRACHIOPODA. 
PART Vile NO; «. 
CONTAINING 
Paces 1—88; Puares I—XII. 
THE SILURIAN BRACHIOPODA. 
BY 
THOMAS DAVIDSON, F.R.S., F.G.S., 
MEMBER OF THE GEOLOGICAL SOCIETIES OF FRANCE, EDINBURGH, AND GLASGOW ; MEMBRE ETRANGER DE L’INSTITUT DES 
PROVINCES, FRANCE, AND LINNEAN SOCIETY OF NORMANDY; IMPERIAL MINERALOGICAL SOCIETY OF ST. PETERSBURG ; 
ROYAL ACADEMIES OF BELGIUM AND OF BAVARIA ; SOCIETE ROYALE HOLLANDAISE DES SCIENCES, HARLEM ; 
ROYAL SOCIETY OF LIEGE; ACADEMY OF ST. LOUIS; AMERICAN PHILOSOPHICAL SOCIETY, 
PHILADELPHIA ; ZOOLOGICAL SOCIETY OF VIENNA; PALHONTOGRAPHICAL SOCIETY 
OF BELGIUM, ETC 
WITH 
OBSERVATIONS 
ON THE 
CLASSIFICATION OF THE SILURIAN ROCKS: 
BY 
SIR RODERICK IMPEY MURCHISON, Bazr., 
K.C.B., D.C.L., M.A., F.B.S., ¥.G.S., 
DIRECTOR-GENERAL OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN AND IRELAND; PRESIDENT OF THE ROYAL GEOGRAPHICAL 
SOCIETY OF LONDON ; TRUSTEE OF THE BRITISH AND HUNTERIAN MUSEUMS, AND OF THE BRITISH ASSOCIATION 
FOR THE ADVANCEMENT OF SCIENCE; CORRESPONDING MEMBER OF THE INSTITUTE OF FRANCE ; 
MEMBER OF THE IMPERIAL ACADEMY OF SCIENCE, AND GEOGRAPHICAL SOCIETY OF 
ST. PETERSBURG ; HON. MEMBER OF THE ROYAL ACADEMIES OF BERLIN, 
COPENHAGEN, STOCKHOLM, BRUSSELS, MUNICH, HOLLAND, 
TURIN, ETC. 
LOW DON: 
PRINTED FOR THE PALAONTOGRAPHICAL SOCIETY. 
1866. 
