THE 



NAUTILUS 



THE PILSBRY QUARTERLY 

 DEVOTED TO THE INTERESTS OF CONCHOLOGISTS 



EDITORS AND PUBLISHERS 



Horace Burrington Baker, 1 1 Chelten Road, Havertown, Pa. 

 (Emeritus Professor of Zoology, University of Pennsylvania) 



Charles B. Wurtz^ Consulting Biologists, 

 1009 Commercial Trust Building, Philadelphia 2, 



R. Tucker Abbott, Henry A. Pilsbry Chair of Malacology 



Academy of Natural Sciences, Philadelphia 3 



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^3.50 per year (^3.65 to Foreign Countries) ^1.00 a copy. 



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Mrs. Horace B. Baker, Business Manager 

 l\ Chelten Road, Havertown, Pennsylvania 



