22 . 
S.A. NAT., VOL. XVI. 
April 10th, 1935. 
South Australian Shells. 
maculate with brown; whorls about seven, convex, the apical one 
smooth, following three or four whorls granulate, the rest dense- 
ly spirally striate with light incremental lines which decussate 
the lirulae, especially beneath; spire slender, its lateral outlines 
concave, last whorl rounded at the periphery or obtusely angled, 
convex beneath; aperture rounded, outer and basal lips thin, 
forming a half circle, columella white, deeply arcuate, ending in 
an inconspicuous tubercle at base; umbilicus deep, funnel-shaped, 
bounded by an angle. Height 12, diam, 11 mm. Robe, beach, 
(Cotton 1934, six examples). These are the only ones we have 
seen from South Australia, and the specimens are apparently 
extra-limital, as the species is Peronian. It occurs in Victoria, 
and Iredale refers to it as a common Sydney shell. May did 
not record it in his Illustrated Index of Tasmanian Shells 1923. 
(Type locality — New Zealand, evidently in error, as the species 
is not reported from there). 
A. calliston Yerco 1905. Text fig. 2. Conical, thin; 
purple-brown, with oblique, axial, creamy, rhomboidal flames, 
from suture to suture; a few creamy spots on the peripheral 
carina; every whorl encircled by four articulated colour bands, 
which in the white areas arc of a more opaque white than the 
rest of those areas, and are crossed by narrow red lines, while 
in the purple areas they are of a deeper purple tint, and are 
crossed by narrow axial white lines; base of a lighter tint, the 
outer six cinguli rose pink, dotted with creamy white; columella 
and umbilicus white, bordered outside with green, which tints 
the inner basal cinguli and curls around the columella into the 
throat; outer lip inner edge golden-brown and white, interior 
shining, nacreous; whorls nine including a protoconch of two 
smooth turns; whorls straight sloping; spiral lirae crowdecT, about 
twenty-four on the penultimate, crossed by oblique crowded 
growth striae; suture linear, immediately beneath the prominent 
Fig. 2 — A stele ( Callistele ) calliston Verco x 4 [after Kes- 
teven ] . 
