MANGELIA. 463 



This rare and beautiful shell has a turreted-fusiform 

 shape, is more or less thin, a little glossy, and is sjjotted 

 on a ground of yellowish white, with somewhat distant 

 markings of chestnut brown, which are chiefly confined to 

 the raised portions of the surface, on which they are 

 disposed lengthways in irregular narrow wavy interrupted 

 streaks. In place of longitudinal ribs, the sculpture 

 consists of abruptly prominent close set spiral ones, which 

 alternate in size and prominence; with these the body 

 is densely encircled throughout ; six are usually present on 

 the penult turn, five on the antepenult volution, and so on. 

 Both ribs and intervals (the latter mere broad furrows) are 

 alike smooth, but a most crowded array of minute raised 

 longitudinal wrinkles adorns the shallow canal (or retuse 

 infrasutural area), which marks the former sites of the 

 labial fissures, and is rather broad on the final coil. Owing 

 to this slight canal, the whorls are very distinctly defined, 

 though the sutural line is very narrow ; the spire, which 

 rather slowly acuminates to a very fine point, is composed 

 of nine volutions, that are rounded below and taper 

 above, are moderately high, and of ordinary longitudinal 

 increase. Rather more than one half of the dorsal length 

 is occupied by the rounded and somewhat ventricose 

 body, which terminates below with a more or less sudden 

 declination and attenuation, in a rather short but well- 

 marked beak. The mouth, which is rather open, and of 

 a sub-oval figure, that is broad above, and is contracted 

 and produced below into a rather wide canal, fills about 

 four-ninths of the total length. The throat is only fur- 

 rowed by the external sculpture. The lateral outline of 

 the rather projecting outer lip is remarkably arcuated ; its 

 edge is acute and simple, not being strengthened behind, 

 even at a distance, by any rib or varix : its posterior 



