236 PYRAMlDELLlDiE. 



brown encircling the body, and two similar ones winding 

 ronnd each of the lower turns of the spire. Occasionally 

 the body-whorl seems adorned with six revolving lines, 

 from the outlines of the zones, the first of which lies a 

 little below the suture, the second in the middle, and the 

 third, which is broader than the rest, at the base of the 

 shell, being alone visible. The spire for the most part 

 consists of about nine or ten whorls, that are divided from 

 each other by a decidedly oblique suture, which is per- 

 ceptible enough on the superior volutions. The longitu- 

 dinal increase of these turns, which are decidedly high — 

 the penult not being much broader than it is long — is 

 moderately fast for the genus. The upper half of the shell 

 tapers rather quickly to a fine point ; the two whorls 

 that form the lower half are subcylindrical ; the body is 

 half as long again as the penult, its basal declination is 

 convex and almost imperceptibly gradual. The mouth, 

 which fills one-third of the total length, is very narrow, 

 has an oblong acuminated shape, and contracts from its 

 well rounded basal extremity to a very acute posterior 

 angle. The outer lip is simple and acute ; its edge is 

 nearly straight or very gently arched, and neither sinuous 

 above nor pouting at the base. The solid white and slant- 

 ing pillar occupies more than half the length of the mouth, 

 and does not form an angle with the base of the penult 

 turn, but unites itself to it in a gently concave line. The 

 inner lip is prominently, though not broadly, reflected at 

 the base of the shell. Our largest example measured a 

 line and a half across, and seven lines in length. 



Two fine specimens of a baudless snow-white shell, 

 Avhich may possibly prove a distinct species, but to which 

 our description of suhulata will otherwise apply (the 

 whorls are a little more convex), were dredged by Mr. 



