﻿A MONOGRAPH 



OF THE 



BRITISH FOSSIL BRACHIOPODA. 



BY 



THOMAS DAVIDSON, F.R.S., F.G.S., 



VICE-PRESIDENT OF THE PAL.EONTOGRAPHICAL SOCIETY ; MEMBER OF THE GEOLOGICAL SOCIETIES OF FRANCE, BELGIUM, 

 EDINBURGH, AND GLASGOW ; FOREIGN MEMBER OF THE PROVINCIAL INSTITUTE OF FRANCE ; OF THE LINNEAN SOCIETY 

 OF NORMANDY; OF THE IMPERIAL MINERALOGICAL SOCIETY OF ST. PETERSBURG; OF THE IMPERIAL SOCIETY 

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

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

 THE AMERICAN PHILOSOPHICAL SOCIETY', PHILADELPHIA ; INSTITUTE OF ALBANY, UNITED 

 STATES ; THE ZOOLOGICAL SOCIETY OF VIENNA ; THE PAL^ONTOGRAPHICAL SOCIETY 

 OF BELGIUM AND OF SWITZERLAND ; THE MALACOLOGICAL SOCIETY OF BELGIUM ; 

 HON. MEMBER OF THE GEOLOGISTS' ASSOCIATION, LONDON ; HON. 

 MEMBER OF THE DUDLEY AND MIDLAND GEOLOGICAL 

 AND SCIENTIFIC SOCIETY ; YORKSHIRE 

 PHILOSOPHICAL SOCIETY, 

 ETC. ETC. 



VOL. IV. 



PART II. No. 1. 



SUPPLEMENT TO THE JUBASSIC AND TRIASSIC SPECIES. 



Pages 73—144; Plates IX— XVI. 



LONDON : 



PRINTED FOR THE PALiEONTOGRAPHICAL SOCIETY. 



1876. 



