Bulletin of the Museum of Comparative Zoology, 

 AT HARVARD COLLEGE. 



VOL. XIII. No. 2. 



No. 2. A SECOND SUPPLEMENT TO THE FIFTH VnU'.ME OF THE 

 TERRESTRIAL AIR-BREATHING MOLLUSKS OF THE UNITED 

 STATES AND ADJACENT TERRITORIES. 



BY W. G. BINNET. 



WITH THREE PLATES. 



CAMBRIDGE: 



PRINTED EOR THE MUSEUM. 

 DKCKMHKK, 1886. 



