

SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES 



, ^ 



FOUNDED BY 



GEORGE W. TRYON, JR. 



CONTINUKD BY 



HENRY A. PILSBRY, Sc.D., 



SPECIAL CURATOR DEPARTMENT OF MOLLUSCA, ACADEMY OF NATURAI 



SCIENCES OF PHILADELPHIA. 



_, 



Part 



PHILADELPHIA : 



PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 



ACADEMY OP NATURAL SCIENCES 



OF PHILADELPHIA. 



