MUSEUM OF COMPARATIVE ZOOLOGY. 33 



Liotia Briareus var. aspina Dall. 



Liotia Bairdii Dall. 



Liotia Bairdii var. iridlala Dall. 



Liotia tricarinata Stearns. 



Liotia ininiata Dall. 



Liotia variabilis Dall. 



Subgenus LIPPISTES Montfort. 



Lippistes acrilla Dall.* 

 Lippistea amabilis Dall. 



Family CYCLOSTREMATIDiE. 



Genus VITRINELLA C. B. Adams. 



Vitrinella Holmesii Dall.* 

 Vltrinella multicarinata Dall.* 



Genus CYCLOSTREMA Marrtat. 

 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 Orbignt. 



Section SCHIZOTROCHUS Monterosato. 

 Scissurella crispata Fleming.* 



Section SCISSURELLA s. s. 

 Scissurella alta Watson. 



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