﻿A MONOGRAPH 



OF THE 



BRITISH STR0MAT0P0E0IDS. 



BY 



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



EEGIUS PEOFESSOE OF NATUEAL HISTOBY IN THE UNIVEBSITY OF ABEEDEEN. 



PART III.— DESCRIPTION OF SPECIES. 



Pages 159—202 ; Plates XX— XXV. 



LONDON : 

 PRINTED FOR THE PAL^ONTOGRAPHICAX SOCIETY. 



1891. 



