280 AMERICAN JOURNAL 



Shell elongately fusiform, longitudinally ribbed, ribs nine, 

 rounded, corded with transverse ridges, with a small granose 

 ridge encircling the interstices ; whorls angulated and slightly 

 excavated at the upper part, angulation encircled by close set 

 granulose ridges ; outer lip lirate within ; whorls convexly 

 rounded ; color reddish brown, granules lighter, aperture violet. 



Marginella polita, Pease. Plate 23, fig. 19. 



{31. cylindracea^ Pease, Proc. Zool. Soc. London, 1862.) 



Description. — T. cylindrica, lgevig^ta, polita, alba, fasciis tri- 

 bus luteis ornata, et ad basim macula lutea ; labro subincrassato, 

 albo medio vix incurvato et contracto ; spira brevissima ; aper- 

 tara linearis, inferne latiuscula ; columella infra vix curvata ; 

 quadriplicata. 



Dimensions. — Long. 11, diam. 4| mill. 



Locality. — Insl. Tarawa. 



Shell cylindrical, smooth, polished, white, ornamented with 

 three broad yellowish bands, and a spot of same color at base ; 

 outer lip slightly thickened externally and white; somewhat 

 involute and slightly contracted in the middle ; spire very short ; 

 aperture linear, slightly expanded at base ; columella very 

 slightly curved below, and four-plaited. 



Marginella Pacifica, Pease. Plate 23, fig. 20. 



Description. — T. oblongo-ovata, polita, alba, lineis luteis sagit- 

 tatis transversis ornata ; spira brevissima ; labro extus, vix in- 

 crassato, medio subinflexo, intus lirato ; apertura vix curvata ; 

 columella quadriplicata. 



Dimensions. — Long. 5, diam. 3 mill. 



Locality. — Paumotus. 



Shell oblong ovate, smooth, polished, white, ornamented with 

 transverse rows of fine yellowish arrow-headed lines ; spire very 

 small, not exserted ; lip slightly thickened externally and in- 

 flexed at the middle, lirate within ; aperture slightly curved ; 

 columella four-plaited at base. 



Quite distinct from 3L sagittata, Hds. The arrow-headed 

 lines are turned to the left. 



Marginella pyriformis, Pease. Plate 23, fig. 21. 



Description. — T. oblongo-pyriformi, lievigata, nitida ; spira 

 brevis ; labro extus incrassato, intus denticulato ; apertura an- 

 gusta linearis ; alba, fasciis tribus luteis ornata, ad suturam, 

 medio et ad basim. 



