A MONOGRAPH 



OF 



BRITISH 



DEVONIAN BRACHIOPODA. 



BY 



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



ETC. ETC 



PART VI. 

 FIRST PORTION. 



LONDON : 



PRINTED FOR THE PAL^ONTOGRAPIIICAL SOCIETY. 

 1364. 



