90 
below it they gradually increase in size anteriorly, rounded, not 
quite as wide as the interstices. Whole surface roughened by 
close-set (two to the line) sub-vertical, imbricating, crinkled, 
incremental lamine. Suture rather widely margined, sinuous, 
generally ascending between the costs, conspicuously crinkled by 
longitudinal Jamin. Umbilicus small, partly covered by the 
inner lip, which is somewhat reflected into it, left margin slightly 
corrugated by varix of the notch. Columella nearly straight in 
its lower half; three distinct equal plaits, slightly oblique, the 
lowest corresponding with the prolongation backwards of the 
varix of the apertural notch. Aperture obliquely ovate, an in- 
conspicuous narrow ascending posterior sinus formed by the mar- 
ginate suture. Canal about one-third of the whole aperture, open, 
wide, slightly deviated to the left, notched anteriorly, very 
slightly recurved. Outer lip acute, thin, a little everted, due to 
incipient formation of a costa, crenated by the spiral lire of the 
whorl, which also form sulcations within ; internally of a deep 
salmon color at the margin, fading into the polished bluish 
white throat, and with somewhat darker red lines in the lirate 
depressions. Inner lip thin, a little spread over the columella, 
and partially occluding the umbilicus, of a glistening pearly-white 
color with a rusty tinge, especially between the plaits and near 
the upper part of the aperture. Ornament, a rusty salmon color 
most marked near the margin of the aperture, nearly hidden 
elsewhere by some green adventitious deposit. Operculum ovate, 
acute, nucleus at anterior apex. 
Length, 46 mm.; greatest breadth, 27 mm.; length of aperture, 
27 mm.; width, 10 mm.; of spire, 19-20 mm. 
Habitat.—Backstairs Passage, 8.A.; 184 fathoms, dredged 
alive, one individual in my collection. 
The shell most allied appears to be Z. concentricus, Rve. My 
shell is not so thick, the costee and lire are more numerous and 
not so valid; the last whorl is longer relatively to the spire. 
ce) ulleinei, spec. nov. Pl. i., fig. 1, la, 10. tb Af foes 
Shell elongately-fusiform, moderately thick. Whorls eight; CGR Zs 
nucleus absent from all the specimens (eight). Spire elongated, 
whorls regularly convex, with spiral lire (on the penultimate six 
primary, and four smaller intermediate in the anterior part), 
acute, about one-third as wide as the interspaces, crossing over 
inconspicuous longitudinal rounded costelle (15 on penultimate 
whorl), as wide as the intervals. Sublenticular longitudinal 
incremental strive not crossing the lire. Suture distinct, slightly 
marginate. Last whorl regularly convex, with about 22 acute 
spiral lire, and eight interstitial strie gradually becoming 
stouter anteriorly until they are as valid as the lire; obsolete 
. 
/ 
