10 EDGAR A. SMITH. 
suture, which is only slightly oblique; aperture rounded, a little longer than broad ; 
peristome continuous, the outer or right margin being simple and unthickened, and the 
columellar edge is slightly reflexed. 
Length, 3°5 millim. ; diam., 2; aperture, 1°2 long. 
Holes 10, 12. In 25 and 127 fathoms. 
A smooth shell without any striking features. Two specimens only were obtained. 
They differ from the other smooth species here described, R. adarensis and R. deserta, in 
form. The body-whorl is broader than that of the former, so that the spire looks more 
conical, and the spire is more produced than that of the latter, the mouth of which is 
larger and rounder than in the present species. 
LOVENELLA ANTARCTICA. 
(Pl. IL., figs. 6, 6a.) 
Shell elongate, subulate, white, not very sharp at the apex; whorls 9, rather 
convex, gradually enlarging, separated by a slightly oblique suture, the three apical 
very finely and closely longitudinally costate, the rest transversely ridged, and marked 
with fine lines of growth; ridges or lire, generally four in number on the upper 
volutions, and about eight on the last whorl, which is contracted anteriorly into a short 
rostrum ; aperture subovate, produced in front into a short, slightly oblique, open canal ; 
outer lip or labrum thin, simple ; columella arcuate in the middle, obliquely truncate 
beneath. 
Length, 7°25 millim.; diam., 2°5 ; aperture, 1°75 long. 
Operculum (fig. 6a) thin, brown, ovate, paucispiral, consisting of about three 
whorls, the nucleus being lateral, but somewhat within the margin. 
Hole 4. In 41 fathoms. 
This very interesting species is at once recognisable on account of the difference of 
sculpture of the upper and lower whorls. The minute apex is smooth and involuted. 
The first of the costate whorls has about eighteen to twenty-five riblets, which increase 
somewhat in number on the next whorl, being closer together. There does not appear 
to be any transverse sculpture on these whorls. The lines of growth on the lower 
volutions are rather distinct, especially between the spiral lire. The base of the body- 
whorl, around the columella, is rather smooth. The type of the genus, Lovenella metula 
(Lovén), has the second whorl finely and closely costellate, in a manner very similar to 
that which obtains in the present species. 
VALVATELLA DULCIS. 
(Pl. IL., fig. 8.) 
Shell turbinate, narrowly but deeply umbilicated, iridescent blue, more or fess 
obscured by whitish, close-set, oblique, thread-like lines of growth and less pearly spiral 
lire ; whorls 5-53, convex, the first 24 yellowish, the penultimate with three or four 
