Siboga-Expeditie 

 XLIX' f 



THE PROSOBRANCHIA, PULMONATA 

 AND OPISTHOBRANCHIA TECTIBRANCHIATA 



Tribe BULLOMORPHA 



OF THE SIBOGA EXPEDITION 



BY 



M. M. SCHEPiMAN 



Bosch en Duin near Utrecht (Holland) 



PART VI 



PULMONATA and OPISTHOBRANCHIA TECTIBRANCHIATA 



Tribe BULLOMORPHA 



With 2 plates 



LATE E. J. BRILL 



PUBLISHERS AND PRIiNTERS 



LEYDEN 19 I 3 



