THE 



NAU 



A MONTHLY JOURNAL 



DEVOTED TO THE INTERESTS OF 



CONCHOLOGISTS 



VOL. XXVI 

 MAY, 1912, to APRIL, 1913. 



EDITORS AND PUBLISHERS: 



A. PII.SBRT, Curator of the Department of Mollusca, Academy of Xntnrnl Sciences 



PHILADELPHIA. 



r. W. JOHNSON. Curator of the Boston Society of Natural IHstoiy, 



BOSTON. 



