SECOND SERIES: PULMONATA 



MANUAL 



OF 



CONCHOLOGY 



VOL. XXV 



PUPILLID^: 



(GASTROCOPTIN/E, VERTIGININ^E) 



BY 

 HENRY A. PILSBRY, Sc.D. 



AND 



C. MONTAGUE COOKE, Ph.D. 



Collaborating on Hawaiian forms 



PHILADELPHIA: 

 PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 



ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA 

 I9I8-I920 





