THE MOUNT DESERT REGION" 175 



Aporrhaidae 



Aporrhais Dillwyn 

 Aporrhais (Arrhoges) occidentalis (Beck) 

 Aporrhais (Arrhoges) occidentalis var. mainensis Johnson 



Muricidae 

 Trophon Montfort 

 Trophon truncatus (Strom) 



Thais Bolten 

 Thais (Nucella) lapillus (Linne) 



Columbellidae 

 CoLUMBELLA Lamarck 



COLUMBELLA (ASTYRIS) ROSACEA (Gould) 

 COLUMBELLA (ASTYRIS) DISSIMILIS StimpSOn 



Alectrionidae 

 Alectrion Montfort 

 Alectrion (Tritia) trtvittata (Say) 



Buccinidae 

 BucciNUM Linne 

 BucciNUM UNDATUM Linne 



Neptunea Bolten 

 Neptunea decemcostata (Say) 



CoLus Humphrey 

 CoLus STiMPSONH (Morch) 



COLUS PYGMAEUS (Gould) 



Cancellariidae 

 Admete Kroyer 

 Admete couthouyi (Jay) 



