^ 



THE 



NAUTILUS 



, A MONTHLY JOUENAL 

 DEVOTED TO THE INTERESTS OF 

 CONCHOLOGISTS 



VOL. XVIII. 

 MAY, 1904, to APRIL, 1905. 



EDITORS AND PUBLLSHERS : 

 H. A. PiLSBRY, Curator of the Department of MoUusca, Academy ol Natural Sciences 



Philadelphia. 



C. W. Johnson, Ciu'ator of the Boston Society of Natural Histoiy, 

 Boston. 



