Bulletin of the Museum of Comparative Zoology, 

 AT HARVARD COLLEGE. 



VOL. XIX. No. 4. 



A THIRD SUPPLEMENT TO THE FIFTH VOLUME OF THE 

 TERRESTRIAL AIR-BREATHING MOLLUSKS OF THE UNITED 

 STATES AND ADJACENT TERRITORIES. 



BY W. G. BINNEY. 



WITH ELEVEN PLATKS. 



CAMB RIDG 1C, U.S.A. : 



PRINTED FOR THK M U S K I M. 

 MAI. IS'.iM. 



