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characteristic of T. speciosus. Ziziphinus compitus, A. Adams, is a
diftercnt species from that described by Philippi, and has since been
described by Souverbie under the name of T. poupineli.
90. Trochus (Calliostoma) decoratus.
Trochus decoratus, Fhibpqn, Con.-Cab. pi. 13. fig. 1.
Zizvphimis decoratus, lleeve, Conch. Icon. fig. 28 ; A. Adams, Proc.
Zool. Soc. 1851, p. 105.
Ilah. “ ? ” ( Philipipi) ; Brisbane waters, East Australia(tof’ew) ;
Sydney and Port Jackson (Coqipinger and Lieut. A . Smith, K.N.).
The interior of the aperture of this species, close to the outer and
basal margin, is thickened with a whitish and more or less cloudy
pearly deposit, Avhich conceals to some extent the beautiful iridescence
observable further within.
91. Trochus (Calliostoma) ruhropunctatus.
Ziziphinus ruhropunctatus, A. Adams, Proc. Zool. Soc. 1851, p. 107 ;
Peeve, Conch. Icon. fig. 56.
H a b . ? {Adams 4' Peeve) ; Albany Island, N. Australia, in
3 -4 fms. on a muddy bottom, aud Port Darwin, N.AV. Australia,
8 - 12 fins. {Copqnnger).
This is a most charming little species, and readily recognized by
its peculiar painting and remarkable sculpture. Adams describes
the colour as “ lutescens.” I sliould rather consider it pale fleshy
pink, with dark red dots in tho interstices between the oblique
costæ and the transverse or spiral ridges. The latter are said to he
four in number on the last whorl ; but on careful examination I find
six, of which four are, however, more prominent than the rest.
The upper volutions are encircled by three principal liræ, and a
fourth secondary one at tho suture. The points of intersection of
these spiral ridges and the oblique costæ are produced into quite
acute nodules or prickles. The base of the shell is almost fiat,
ornamented with about six concentric liræ, which are more or less
granulons, with the interstices exhibiting strong lines of growth
and translucent nacre. The colour closely approaches the rest of
the surface, varied wnth brown dots both upon and between the
granules.
92. Trochus (Thalotia) torresi. (P late VI. fig. A.)
Shell sharply conical, subperforatcd or with the perforation concealed,
greenish (sometimes pinkish red), with oblique Avhite narrow
stripes aud darker green (or rosy black) spotting a t the base of tho
whorls and upon the angle of the last. Volutions about 8, flat,
margined at the lower part with two roivs of closely packed grannies
rather more prominent tlian five others above. Bctiveen these, iu
well-preserved specimens, very fine liræ (one in each interstice) and
oblique lines of growth are discernible. Last whorl rather acutely
angled at the periphery, beneath with about nine concentric rows of
1;
granules alternating with others very much finer, having smaller
and suhohsolete tubercles. Tlie aperture is obliquely subqnadrate.
Columella a little arcuate at the upper part, white, reflexed over
the white umbilical region and suhtruncate anteriorly. Height
12 millim., diam. 9 | ; another specimen is 13 high, aud 12 in
width.
Hab. Prince of Wales Channel, Torres Straits.
There are two varieties of this pretty species, which may he
termed the green and pink. The former is represented by four
specimens in the Museum (three belonging to the Cumingian collection)
and the latter by two, which fact, however, can hardly be
accepted as indicating the relative abundance of the two forms _
In tho green variety the base in three out of the four examples is
somewhat pinkish, radiately streaked with white, whilst in the
fourth specimen it is green with irregular streaks and has a more
tessellated aspect. The perforation is small, and may either he concealed
by a thin callosity or remain open.
This is a smaller species than P. fragum (Phil.), has more numerous
grannies (of Avhich there u v e fv e instead of four rows, besides
the basal girdle), and intervening fine lira? are generally to be met
with on the spire, which are wanting m Philippi s shell. I should
also observe th at the columella of T. fragum, judging from the
figure, is less incurved than in this form.
93. Trochus (Monilea) lifuaua. (P late Y1. figs. B, B 1.)
Fischer, Journ. de Con. 1878, vol. xxvi. p. G3_.
Monilea lifuana, Fischer, I. c. 1879, vol. xxvn. J3.^y>0, jil. 3. fig. 5.
Trochus lifuanus, Fischer in Kiener s Coq. Viv. p. 388, pi. ilb .
fig. 4.
Shell suhorbicular, only slightly elevated, moderately thick, narrowly
urnhilicated, spirally lirate and striated throughout, and
marked with rather distinct lines of growth, pinkish white, varied
with large brownish blotches and transverse lines articulated with
white and dark pnrjdish brown. AVhorls 5 |- 6 , convex, separated
bv a deejfish suture. I.ast whorl comjiressed, convex and concentrically
striated beneath, obtusely subangled at the perijjhcry. Sjnre
not much elevated, having slightly convex outlines. Umhihcus
narrow, perforate to the ajicx, margined with a thickened sjnral
white or spotted callus and furnished with a second more elevated
one within, which terminates on the columella in a lateral yellowish
projection. Aperture quadrately subcircular, oblique, only thinly
nacreous within. Columella oblique, arcuate, thickened by the ends
of the two sjiiral callosities of the umbilicus and slightly reflexed.
Outer lip (viewed laterally) obliquely excurved above the periphery
and broadly sinuated beneath. . Height 6| millim.; greatest diameter
9, smallest 7 |. „ . „
Hab. Prince of Wales Channel, Torres Straits,_ / ims._
The colouring in the two specimens from this locality is very
similar, differing only in the amount and size of the blotches, which
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