138 Proceedings of the Biological Society of Washington. 



Progabbia, new subgenus for west American Cancellarias, type Can- 

 cellaria cooperi Gabb, witb a new section, Crawfordia, for species of the 

 type of Cancellaria crawfordiana Dall. 



Boreomelon, new subgenus of Fulgoraria, type Scaphella stearnsii Dall, 

 Alaska. 



Phenacoptygma, new genus of Volutidae, type Surculina cortezi Dall, 

 California. 



Atrimitra, new subgenus of Slrigatella, for the black Pacific coast 

 Mitras, type Mitra idae Melvill. 



