10 



brunneis tribus conspicuis ; labio externo crassiusculo denticulis 

 panels intus prope centrum positis ; labio interno recto, ad 

 marginem externum varice ])rominente instructo ; canali lato, 

 obtiiso. 



Shell oblong-ovate, of a dull white colour, with three dark reddish 

 browu interrupted bands traversing the last whorl, the anterior ex- 

 tending from the fore-part of the outer lip to that of the aperture, 

 the second continuing along the anterior margin of the volutions to 

 near the apex, and the third passing similarly on their posterior mar- 

 gin to the same extent ; opake, whitish, distinct, small round spots 

 pervade the four anterior volutions, being in rows, obliquely or longi- 

 tudinally placed ; shell, within of a dull white colour, the three bands 

 being conspicuous ; spire acuminated ; volutions seven, the three an- 

 terior smooth, the posterior obtusely striated longitudinally, apex 

 whitish ; aperture rather wide and straight ; outer lip somewhat 

 thick, having a few (one or two) rather prominent denticulations 

 vnthin the edge, about the centre ; inner lip straight, with a rather 

 strong varix at its outer edge ; channel wide and obtuse ; a few 

 striae pass obliquely over the anterior part of the columellar side of 

 the dorsum. 



Length, ^^ of an inch ; vddth, J^ of an inch. 



Hab. 1 Cab. Gaskoin. 



15. CoLTJMBELLA SAGiTTA. Tcsta oblonga, subcylindracea, an- 

 gustata, Icevis, nitens, semipellucidula, pallidissime brunnea ; 

 fasciis duabus angustis interritptis albidi-opacis, ab postico 

 margins anfractuum ad apicem continuis ; spird acuminatd, 

 3-5 longitudinis testa ; anfractibus octo ; aperturd brevi, laid; 

 labio externo crassiusculo extus margine albini-opaco, versus 

 canalem incurvato, labio interno Icevi nitido ; dorso antici 

 transversim striato; canali longiusculo, latiusculo; peritremate 

 subquadrangulo. 

 Shell oblong, subcylindrical, narrow, smooth, shining, semitrans- 

 parent, of an extremely pale brown colour, with a very narrow inter- 

 rupted opake white band arising from about the middle of the outer 

 lip, and continuing along the anterior edge of the whorls to the apex ; 

 the markings forming this band are pointed, the points being toward 

 the outer lip ; large white opake markings occupy the entire poste- 

 rior margin of the volutions, conjoined at the suture by broad bases, 

 and, diminishing pyramidally to a point, extend across the volutions, 

 and between each pyramidal mark, fitting the interstices, are dark, 

 reddish-brown, barb-shaped colorations ; spire acuminated, constitu- 

 ting three-fifths the length of the shell ; volutions eight, very slightly 

 convex ; aperture short, rather wide ; outer lip moderately thick, 

 much incurvated to form the channel, vrith a whitish opake strong 

 margin externally, edentulous ; inner lip even, and shining, with a 

 slight varix along its outer border, from which several rather promi- 

 nent striae traverse the anterior part of the dorsum to the fore part of 

 the outer lip ; the columella terminates angularly at the beginning of 



