A MONOGRAPH 
OF THE 
BRITISH FOSSIL BRACHIOPODA. 
PART VII. NO. III. 
CONTAINING 
Pages 169—248; Pirates XXIII—XXXVII. 
THE SILURIAN BRACHIOPODA. 
BY 
THOMAS DAVIDSON, F.R.S., F.G.S., 
VICE-PRESIDENT OF THE PALHZONTOGRAPHICAL SOCIETY ; 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 ; 
SOCILTE ROYALE HOLLANDAISE DES SCIENCES, H ARLEM ; ROYAL SOCIETY OF LIEGE ; ACADEMY OF 
ST. LOUIS ; AMERICAN PHILOSOPHICAL SOCIETY, PHILADELPHIA; ZOOLOGICAL SOCIETY OF 
VIENNA; PALHZONTOGRAPHICAL SOCIETY OF BELGIUM ; HON. MEMBER OF THE 
DUDLEY AND MIDLAND GEOLOGICAL AND SCIENTIFIC SOCIETY, ETC. 
LONDON: 
PRINTED FOR THE PALZONTOGRAPHICAL SOCIETY, 
1869. 
