256 Description of New Species 



tura postice angnsta, flexuosa, antice hiante ; columella postice ventri- 

 cosa, antice subangusta, plana, plica marginali valido munita ; dentibus 

 columellaribus circa septemdecim, mediis tenuissimis, posterioribus paulo 

 majoribus et anterioribus subvalidis ; labii extend dentibus circa viginti 

 duo, subaequalibus, parvis, brevibus ; extremitatibus productis ; inci- 

 sura sipbonale scmi-ovata, vix obliqua ; spira umbilicata, linea dorsali 

 obsoleta. 



Dorso colore coerulescente, marula rufescente-purpurea, sub-centrali 

 et lineis stramineis undulatis longitudinalibus obscuris ornato ; lateribus 

 luteis ; basi earned ; marginibus maculis bepaticis nunierosis ornatis ; 

 extremitatibus utrinque et plica marginal] violaceis. 



Shell smooth, polished, oblong-ovate, with the back pos- 

 teriorly elevated and thence declining with a gentle curvature 

 towards the anterior part ; external margin thickened, angular, 

 and the inflected lip flattened ; internal margin almost round ; 

 base nearly flat ; aperture behind narrow and flexuous, before 

 gaping ; columella posteriorly rather ventricose, anteriorly 

 rather narrow, flattened and armed with a strong marginal 

 plait (or tooth) ; the number of the columellar teeth about 

 seventeen, of which the middle are very delicate, the posterior 

 slightly more developed and more distant from each other, and 

 the anterior quite stout ; on the outer lip are about twenty-two 

 nearly equal, rather delicate and short teeth, but considerably 

 stouter than any of those on the columellar lip, except a few of 

 the anterior ones ; the extremities produced ; siphonal notch 

 semi-ovate, hardly oblique ; spire concealed, with a narrow 

 and shallow umbilicus ; dorsal line indefinite. 



The back is of a bluish color, furnished with a single large 

 reddish purple spot and with blurred longitudinal undulating 

 straw-colored lines ; sides with a yellow band separating the 

 color of the back from that of the margins and base ; the latter 

 are a yellowish flesh color ; the margins with numerous irregu- 

 larly distributed rather large purplish brown spots ; the extre- 

 mities on both sides and the marginal plait of a violet color. 



