MUSEUM OF COMPARATIVE ZOOLOGY. 33 



Liotia Briareus var. aspina Dall. 



Liotia Bairdii Dall. 



Liotia Bairdii var. trullata Dall. 



Liotia tricarinata Steams. 



Liotia miniata Dall. 



Liotia variabilis Dall. 



Subgenus LIPPISTES Montfort. 

 Lippistes acrilla Dall.* 

 Lippistes amabilis Dall. 



Family CYCLOSTREMATLLXE. 



Genus VITRINELLA C. B. Adams. 



Vitrinella Holmesii Dall* 

 Vitrinella multicarinata Dall * 



Genus CYCLOSTREMA Marryat. 

 Cyclostrema turbinum Dall. 

 Cyclostrema pompholyx Dall. 

 Cyclostrema cistronium Dall* 

 Cyclostrema granulum Dall* 



Section GRANIGYRA Dall. 

 Cyclostrema limatum Dall. 



Super-Family DICRANOBRANCHIA. 



Family HALIOTID^. 



Genus HALIOTIS Linne. 

 Haliotis Pourtalesii Dall. 



Family SCISSURELLID^. 



Genus SCISSURELLA Orbigny. 



Section SCHIZOTROCHUS Monterosato. 

 Scissurella crispata Fleming.* 



Section SCISSURELLA s. s. 

 Scissurella alta Watson. 

 vol. xviii. 3 



