

me Dito ON THE eVARIATION,;. DISTRIBUTION, 
AND EVOLUTION OF THE GENUS PARTULA 
THE SPECIES OF THE MARIANA ISLANDS, GUAM AND SAIPAN 
By Henry Epwarp Crampton, Pu. D. 
Associate of the Bishop Museum of Honolulu, 
Research Associate of the Carnegie Institution of Washington, 
Professor of Zoology, Barnard College, Columbia University 


