SECOND SERIES: PULMONATA 



MANUAL 



OF 



CONCHOLOGY 



VOL, XXVIII 



Geographic Distribution of Pupillidae; Strobilopsidae, 

 Valloniidae and Pleurodiscidae 



BY 



HENRY A. PILSBRY 



Review of the anatomy of Pupillidae and related groups 

 By H. Burrington Baker 



^'^^»^ 



PHILADELPHIA : 



PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 



ACADEMY OF NATURAL SCIENCES /^ 



OF. PHILADELPHIA i*^f^ 



^927-1935 LuJLIBRAfi 



