MUSEUM OF COMPARATIVE ZOOLOGY. 



Leucosyriiiac tenoceraa Dull. 

 Leucosyrinx aubgiundifera Dall. 



Sul)-ciius ANCISTKOSYUINX Dall. 

 Ancistrosyrinx elegans Dull. 

 Aucistrosyrinx radiata Dall. 



Subgenus GENOTA Adams. 

 Genota mitrella Dall. 



Section DOLICIIOTOMA Bellardi. 

 Genota viabrunnea Dall. 



Genus DRILLIA Gray. 

 Drillia ostrearum Stearns. 

 Drillia Tryonii Dall. 

 Drillia albicoma Dall. 

 Drillia detecta Dall. 

 Drillia alesidota DaU.* 

 Drillia alesidota var. macilenta Dall. 

 Drillia polytorta Dall. 

 Drillia eucosmia Dall. 

 Drillia eucosmia var. canna Dall. 

 Drillia haliostrephis Dall. 

 Drillia acestra Dall. 

 Drillia pharcida Dall.* 

 Drillia acrybia Dall. 

 Drillia tristicha Dall.* 

 Drillia ebur Reeve. 

 Drillia fucata Reeve.* 

 Drillia pagodula Dall. 

 Drillia pagodula var. pentagonalis Dall. 

 Drillia cocoinata Reeve. 

 Drillia thea var. carminura Dall. 

 Drillia Simpsoni Dall.* 

 Drillia lissotropis Dall. 

 Drillia Dalli Verrill. 

 Drillia Dalli var. acloneta Dall. 

 Drillia Dalli var. cestrota Dall. 

 Drillia nucleata Dall. 

 Drillia Verrillii Dall. 

 Drillia havanensis Dall. 

 Drillia premorra Dall. 

 Drillia oleacina Dall. 

 Drillia smirna Dall. 

 Drillia lithocolleta Watson. 



