A MONOGRAPH 



OF THE 



BRITISH FOSSIL BMCHIOPODA. 



PART Y. 



THE CAHBONIFEEOUS BRACHIOPOD A, 



BY 



THOMAS DAYIDSON, F.R.S., G.S., &c. 



LONDON : 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 

 1858— 18G3. 



