SECOND SEKIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES 



VOL. XXII 

 ACHATINELLIDJE 



BY 



HENRY A. PILSBRY 



ASSISTED BY 



C. MONTAGUE COOKE 



GENEALOGY AND MIGRATIONS OF THE ACHATINELLIDuE 



BY 



ALPHSU:?-. HYATT 



PHILADELPHIA: 

 Published by the Conehologieal Department 



ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA 

 1912-1914 



