transverse lirie are nodose on crossing the ribs, three in number
upon the upper Avhorls, a fourth being present upon the lower part
of the penultimate aud sixteen to eighteen on the last. Another
feature Avorth noticing is the presence of a finer thread-like line
above the uppermost of the chief liraj, Avhich runs in a slight concavity
at the upper p a rt of the wliorls.
Tlie aperture is narrow, as is tho shell itself, not greatly contracted
at tho canal, and occupies rather less than half the length of the
shell. The columella is snbperpendicular, a little tortuous and
smooth, without lirse or tubercles. The outer lip is thickened with
an exterior rib, hut thin and sharp at the extreme margin. I t is
widcty and semicircularly notched above ju st below the suture in
tlie faint concavity of the whorl, and generally in adult shells bears
a small tubercle Avithin close to or ju st below the sinus, with which
exception it is smooth.
8. Pleurotoma (Daphnella) axis.
Pleiu’otoma axis, Reeve, Conch. Icon. fig. 311.
Hah. Port Molle, 14 fms. (Cop])inger) ; Philippines (Cuming).
The apical whorls of this, as in all the other species of the
group Daphnella, are microscopically cancellated by oblique crisscross
lines. The four or five succeeding volutions are coarsely cancellated
by longitudinal costa? and spiral ridges, the points of "intersection
being subnodose. Beyond this the remaining whorls (about
three in number) are destitute of the costæ, exhibiting only spiral
ridging of different degrees of fineness and intermediate finer striæ
crossed only by the lines of growth.
One of these ridges towards the upper part of the whorls is
especially prominent, giving them a somewhat shouldered appearance,
and hctAveeu this and the upper tliiclcened margin there is a decided
concavity. Ih c aperture is elongate, contracted anteriorlA' into a
distinct and someAA+at recurving canal, together occupying a little
less than half the total length of the shell. The labrum is a trifle
thickened, presenting exteriorly a slightly swollen appearance, has
a rather deep slit above at the suture, is smooth within, and crenu-
lated finely along the edge.
9. Pleurotoma (Daphnella) arafurensis. (P late IV. fig. 0 .)
_ SheU fusiform, whitish, faintly banded with light brown, spirally
ridged and striated and marked with the flexuons lines of growth.
Mhorls 7 ; tAvo apical globose, microscopically reticulated, but appearing
smooth under an ordinarj’ lens, rather la rg e ; the remaining
five p e couA-ex, a little constricted beneath the suture, and
spirally ridged and striated. The upper whorls have four or five
principal lira;, the uppermost falling ju st beneath the slight constriction,
and the others below at equal distances. The whorls are
thickened at or immediately under the sutural line with an elevated
ridge, and between this and the first lira and in the interstices
between the other liræ the surface is finely striated. The last
whorl is elongate, has about thirty-one ridges in addition to the
minute interstriation. The aperture is narrow, contracted anteriorly
into a short, broadish canal, together equalling almost half
the total length of the shell. The columeUa is perpendicular,
curving a little to the left in front, and coated Avith a very thin
callosity. The labrnm is thickened exteriorly, arcuate in the middle,
faintly sinuatcd towards the lower extremity, and rather deeply
notched in the slight constriction of the whorl near but not at the
suture. ^ ^ , 1 1
Length 15 millim., diam. of last whorl above the mouth 4^ ;
aperture 7 long, 2 wide.
Hah. Arafura Sea, N. Australia, 32-36 fms.
This species is peculiar on account of the absence of longitudinal
costæ. The outer lip is smooth in the single specimen at hand, but
in other and more mature shells it might he more or less dentate
within.
10. Cythara cylindrica, var. (P late IV. figs. H -H l . )
Mangelia cylindrica, Reeve, Conch. Icon. sp. 9.
Var. = M. lyrica, Reeve, I. c. sp. 30.
Hah. Port Curtis, 7 fms. (Coppinger) ; Philippine Islands
(Cuming).
This species differs from the typical Oytharce in having no tran sverse
liræ on the columella, in this respect agreeing with 0. horn-
heclcii, Eeeve, G. turricula. Peeve, and G. vitiensis, Smith.
The variety (0. hjrica) is a trifle larger than the normal form,
and the rihlets are rather stronger at the upper termination. With
these feeble distinctions the differences end. In both forms a
minute tubercle is sometimes, but not always, met with upon the
upper part of the colninella, and about fifteen fine liræ may be
counted within the exteriorly thickened lahnim, Avhich is shalloAvly
siniiated near the suture, and prominently arcuated Avhen viewed
laterally. The longitudinal costæ number about fourteen on the
penultimate whorl, and the principal transverse thread-like liræ
about eight, hut upon the last volution there are as many as twenty-
six. The entire surface is heaiitifiilly cancellated with minute
raised lines of growth and microscopic spiral liræ, a feature seen
only in well-preserved shells and under a jiowerful lens. The
sculptured whorls are s is in number, tho remaining two apical ones
being smooth and glassy. _ _ _ -n j. n j--
The single specimen, in beautifnl condition, from l o r t hiirtis,
presents certain differences which it may he_ as well to mention.
At the upper part the whorls exhibit a faint _ concavity a little
beneath the suture, of which I perceive a trace in the type of tho
species, but not in the variety (C. lyrica),'md the costæ are rather
more numerous, there being about 17 upon the penultimate whorl,
P I