THE 



NAUTILUS 



A MONTHLY JOURNAL 



DEVOTED TO THE INTERESTS OF 



CONCHOLOGISTS 



VOL. XXIV. 

 MAY, 191O, to APRIL, 1911. 



EDITORS AND PUBLISHERS : 



H. A. Pii4pRY, Curator of the Department of Mollusca, Academy of Natural Sciences, 



PHILADELPHIA. 



C. W. JOHNSOS, Curator of the Borton Society of Natural History, 



BOSTON. 



