222 



SCALID^. 



polita, Soiv. 

 porrecta, Hinds. 

 principalis, Pallas. 

 pulcherrima, Sow. 

 replicata, Sow. 

 rubrolineata, Sow. 

 scalaris, Linn. 

 similis, Sow. 

 striata, Gray. 



subtilis, Sow. 

 sulcata, Sow. 

 tenuicostata, Sow. 

 texturata, Gould. 

 trifasciata, De Haen. 

 tumcula. Sow. 

 venosa, Sotv. 

 vestalis, Hinds. 



Sub-gen. olathrus, Oken. 



Shell turreted, thick, solid, whorls united, with numerous 

 thick, longitudinal varices ; aperture ovate, effuse anteriorly ; 

 umbilicus concealed, not pervious. 



angulata. Say. 

 clathrus, Linn. 

 counexa, Sow. 

 Eschrichti, Holb. 

 fusca, So2v. 

 Groenlandica, Chem. 

 hexagona, Sow. 

 lamellosa, Lam. 



Ochotensis, Midd. 

 ovalis, Sow. 

 pyramidalis, Sow. 

 tenuis, Sow. 

 Trevelyana, Leach. 

 Turtonis, Bisso. 

 unifasciata, Sow. 



Sub-gen. opalta, H. and A. Adams (Clathrus, Gray, 



not Oken). 



Shell turreted, imperforate ; whorls not disunited, the last 

 with a conspicuous spiral ridge round the umbilical region. 



australis. Lam. 

 coronata, Lam. 

 crassicostata, Soiv. 

 Diana, Hinds. 



raonocycla, Kicn. 

 statuminata, Sow. 

 undulata, Sow. 

 vulpina, Hinds. 



