NEW WEST COAST MOLLUSKS—BARTSCH. 



183 



ribs. Base rather short, sloping somewluit concav^ely from the periph- 

 eral keel to the insertion of the broad cohmiella, marked by a weak 

 spiral thread at the base of tiie columella and the continuation of the 

 axial ribs which extend well up on the columella. Aperture suboval, 

 decidedly chanmdc^d at the iunction of the lip and cohnnella with the 

 posterior angle obtuse. 



The smaller of the two cotypes. Cat. No. U>5;^03, ILS.N.M., has the 

 nucleus complete and S post-nuclear whorls and measures: Length 3.8 

 mm.; diameter 1.3 mm. The other, Cat. No. 1.53045, LJ.S.N.M., has 

 8 post-nuclear whorls, having lost the nuclear and probably two of the 

 post-nuclear turns; it measures: Length -!.<'> nun.; diameter 1.5 mm. 



This species has heen confounded with the European Metaxia 

 inetaxae, under which name it lias appeared in many lists. 



Speciniati< exdinuifl. 



