A MONOGRAPH 



BRITISH STR0MAT0P0R0IDS. 



H. ALLEYNE NICHOLSON, M.D., D.Sc, Ph.D., E.G.S. 



REGIUS PKOFESSOE OF NATURAL HISTORY IN THE UNIVERSITY OF ABERDEEN. 



PART II.— DESCRIPTION OF SPECIES. 



Pages 131—158. Plates XII— XIX. 



LONDON : 



PRINTED FOP THE PALJEONTOGRAPHICAL SOCIETY. 



1889. 



