hell 
Se adland 
Plate IV 
No.8 
Plate IV 
No.9 
Plate IV 
No. 10-10a. 
open and rounded at the upper end; the outer lip is sharp 
and crinkly; the inner lip smooth. At the upper end of 
the aperture and on the interior is a large brown patch, 
The spire is short, and only about one-third the height of 
the aperture. This species is not so common as the T, 
succincta, and is found in the same localities, on rocks 
between tide marks. ; 
Throughout New Zealand. Mount Maunganui; Chat- 
ham Islands. 
THAIS SCOBINA (Thais, the wife of Ptolemy Soter 
I.; scobis, sawdust)—A small, rough, thick brown or 
stone-coloured Dog winkle with sharp nodules profusely 
scattered over the surface, which give it the appearance 
of being sprinkled with sawdust. The interior is purple 
or chocolate, and there is a narrow white band edging the 
margin of the outer lip. About an inch long, it is very 
common on rocks near to high-water mark. Some of the 
young shells are black and white, with a sharp apex to the 
spire, and the growth lines have a flounced effect. 
North Island as far as Cook Strait. Mount Maunganui. 
THAIS SCOBINA var. ALBOMARGINATA (Thais, 
the wife of Ptolmeny Soter I.; scobis, sawdust; albomar- 
ginata, with a white margin).—About the same size or, if 
anything, a little smaller than the species, and having no 
hollow spines or sharp nodules. The shoulders of the 
whorls are more rounded, and, in place of the spiral ribs, 
are alternate spiral threads or bands of black and white, 
or pale stone-colour and black. The white margin to the 
outer lip, being common to both species and variety, can- 
not be regarded as a characteristic feature, notwithstand- 
ing the name. 
St. Helier’s Bay; Auckland Harbour; Mount Maunga- 
nui. 
THAIS STRIATA (Thais, the wife of Ptolemy Soter 
I.; striata, striated) —A white or yellowish Dog winkle, 
about one and a-half inches long, thickly built, with a small 
pointed spire of about the same height as the aperture 
(or, in some specimens, only half that height), sculptured 
with well-marked, rounded spiral ribs, of which there are 
nine on the body whorl and four on the whorl immediately 
above it. The nine ribs are peculiar to the species. The 
aperture is fairly large, oval, faintly angled above, and ends 
below in a short, open narrow canal, notched at the base, 
and directed to the left. The outer lip is bevelled off to 
a sharp edge, rather crinkly and toothed inside. The in- 
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