THE 



NAUTILUS 



A MONTHLY JOURNAL 



DEVOTED TO THE INTERESTS OF 



CONCHOLOGISTS 



VOL. XXII. 

 MAY, 19O8, to APRIL, 19O9. 



EDITORS AND PUBLISHERS : 



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



PHILADELPHIA. 



C. W. JOHNSON, Curator of the Boston Society of Natural History, 



BOSTON. 



