SECOND SERIES: PULMONATA 



MANUAL 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES 



FOUNDED BY 



GEORGE W. TRYON, JR. 



CONTINUKD r.V 



HENRY A. PILSBRY, Sc.D., 



SPECIAL CURATOR DEPARTMENT OF MOLLUSCA, ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA. 



65 Colored. 



PHILADELPHIA: 



PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 



ACADEMY OF NATURAL SCIENCES 



OF PHILADELPHIA. 



