■mi 



THE 



NAUTILUS 



A MONTHLY JOURNAL 



DEVOTED TO THE INTERESTS OF 



CONCHOLOGISTS 



VOL. XXV. 

 MAY, 1911, to APRIL 1912. 





EDITORS AND PUBLISHERS: 

 H. ▲. PiUBBT, Curator of the Department of MoUusca, Academy of Natural Scleiicra 



Philadelphia. 



C. W. JoH>80N, Curator of the Boston Society of Natural UlstoiT, 



Boston. 



