hy November, 1884. | 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
moved DUBLIN SOCIETY. 
VOLUME III. (SERIES II.) 
V.—ON THE ORIGIN OF FRESHWATER FAUNAS: A STUDY IN EVOLUTION. 
BY W. J. SOLLAS, M.A., Dublin; D.Sc, Cambridge; Fellow of St. John’s 
College, Cambridge; Professor of Geology and Mineralogy in the University of 
Dublin. 
DUB Gh IN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND WELDRICK, 
PRINTERS TO THE SOCIETY. 
1884. 
Price One Shilling and Sixpence. 
