OP CONCHOLOGY. 281 



Dimensions. — Long. 6, diam. 3 mill. 



Locality. — Paumotus. 



Shell oblong pyriform, smooth, shining, -white, with three yel- 

 lowish bands at the suture, in the middle and at the base ; spire 

 short ; outer lip thickened externally, denticulate within its 

 whole length ; aperture narrow linear. 



Marqinella Paumotensis, Pease. Plate 23, fig. 22. 



Description. — T. oblonga, subcylindrica, polita, laevigata, alba, 

 luteis trifasciata ; spira brevissima ; labro medio inflexo, intus 

 Isevigato ; columella ad basim laminato callosa, triplicata. 



Dimensions. — Long. 5, diam. 2J mill. 



Locality. — Paumotus. 



Shell oblong, somewhat cylindrical, polished, smooth, white, 

 with three faint yellowish bands ; spire very short ; lip inflexed 

 at the middle, smooth within ; columella laminately callous at 

 base, three-plaited. 



The above may possibly belong to genus Volutella. It has 

 somewhat the appearance of M. polita, Pease. The columella 

 folds will serve to distinguish it. It is also much smaller and 

 more slender. 



Volutella elongata. Pease. Plate 23, fig. 23. 



Description. — T. elongata, subcylindrica, laevigata, alba, lutea 

 pallide fasciata ; spira brevissima ; labro subincrassato, involute ; 

 apertura angusta, linearis, infra subdilatata ; columella quadri- 

 plicata, ad basim Jaminato-callosa. 



Dimensio7is. — Long. 9|, diam. 3| mill. 



Locality. — Insl. Fanning. 



Shell elongate, somewhat cylindrical, smooth, white, faintly 

 banded with yellowish ; spire very short, outer lip slightly thick- 

 ened externally, involute; aperture narrow, linear, slightly ex- 

 panded at base ; columella four-plaited, laminately callous at 

 base. 



Olivella (Callianax) simplex, Pease. Plate 23, fig. 24. 



Description. — T. subfusiformi, ad basim truncata, laevigata, 

 alba ; anfr. 4 ad suturam marginatis subangulatis, spira vix pro- 

 ducta ; labro Isevigato ; apertura lata ; columella callosa, vix 

 curvata. 



Dimensions. — Long. 4|, diam. 2 mill. 



Locality. — Paumotus. 



