XKVl APPENDIX. 



2094. MITRA SUCCINCTA, Swainson. 



M. testi ovato-fasiformi, alba fusco-varia; costis 

 traiisversis carinatis, interstitiis serie bina punctis, 

 spiru gracili, breviore ; labio crenato. 

 Shell ovate-fusiform, with transverse carinated 

 strisB, the interstices with a double series of punc- 

 tured dots, white varied with brown; spire slender, 

 rather short, lip erenated. 



Obs. The shape and habit of this shell is inter- 

 mediate between M. grcmatina, Lam. and M. textu- 

 rata, having the more slender form of the fii'st, and 

 the shorter spire of the second. The whole shell is 

 crossed by elevated, well defined, and somewhat ca- 

 rinated striae, or rather ribs, sufficiently apart to ad- 

 mit of two series of linear punctures, divided by an 

 indented line, between each rib. The spire is slen- 

 der, and shorter than the aperture; and the outer lip 

 obtusely erenated. The ground colour of the shell 

 is white, marked by broad and somewhat interrupted 

 shades of brown, disposed longitudinally; pillar 

 5 plaited. In another specimen the brown shades 

 assumed the appearance of bead-like dots on the 

 ribs. 



2095. MITRA SULCATA, Swainson. 



M. test^ parvH, subconiformi, transversim sulcata, 



alba griseo-varia ; fauce fusc^ ; labio crenato. 

 Shell small, subconical, transversely sulcated, white 

 varied with grey, throat brown ; lip erenated. 

 Obs. In shape nearly approaching to M. carinata 

 (Sw. ill. of Zool. pi. 2. ined.) but its shorter spire 

 gives it something the appearance of a ConcBlix. 

 The whole shell is crossed by deeply sulcated striae, 

 or more properly grooves; the interstices being 

 convex on the body whorl, but rather carinated on 

 the shoulder and spire, Avhich gives to these parts an 

 angulated appearance ; the base is contracted, and 



