MUSEUM OF COMPARATIVE ZOOLOGY. 31 



Genus UMBONIUM Link. 

 TJmbonium Bairdii Dull. 



Genus TEINOSTOMA Adams. 



Subgenus ETHALIA H. & A. Adams. 



Ethalia reclusa Dull. 

 Ethalia suppressa Dull.* 

 Ethalia solida Dull. 



Subgenus DILLWYNELLA Dall. 

 Dillwynella modesta Dall. 



? Subgenus COCHLIOLEPIS Stimpson. 

 Cochliolepis parasitica Stimpson.* 

 Cochliolepis striata Dall.* 



Genus CALLIOSTOMA Swainson. 



Section CALLIOSTOMA s. s. 

 Calliostoma euglyptum Adams. 

 Calliostoma Bairdii Verrill & Smith. 

 Calliostoma Bairdii var. Psyche Dall. 

 Calliostoma ciroumcinctum Dall. 

 Calliostoma echinatum Dall. 

 Calliostoma sapidum Dall. 

 Calliostoma tiara Watson. 

 Calliostoma corbis Dall. 

 Calliostoma roseolum Dall. 

 Calliostoma apicinum Dall. 

 Calliostoma aurora Dall. 

 Calliostoma orion Dall. 



Section EUCASTA Dall. 

 Calliostoma Indiana Dall. 



Section EUTROCHUS A. Adams. 

 Calliostoma jujubinum Gmelin. 

 Calliostoma jujubinum var. tampaensis Conrad. 

 Calliostoma jujubinum var. Rawsoni Dall.* 

 Calliostoma yucatecanum Dall. 

 Calliostoma Sayanum Dall.* 

 Calliostoma Benedicti Dall.* 

 Calliostoma cinctellum Dall. 

 Calliostoma asperrimum Dall. 

 Calliostoma asperrimum var. dentiferum Dall. 

 Calliostoma asperrimum var. serifilatum Dall. 



