A MONOGRAPH 



OF 



BRITISH GEAPTOLITES. 



BY 



GERTRUDE L. ELLES, Sc.D., 



LATE GEOFFREY FELLOW, NEWNHAM COLLEGE, CAMBRIDGE ; 



AND 



ETHEL M. R. WOOD, D.Sc. 



[Mrs. SHAKESPEAR], 



OF NEWNHAM COLLEGE, CAMBRIDGE; AND THE UNIVERSITY OF BIRMINGHAM. 



EDITED BY 



CHARLES LAPWORTH, LL.D., F.E.S., 



LATE PROFESSOR OF OEOLOGY IN THE UNIVERSITY OF BIRMINGHAM. 



HISTORICAL INTRODUCTION. 



LONDON: 

 PRINTED FOR THE PALJIONTOftRAPHICAL SOCIETY. 



1901—1918. 



