S.A. NAT., VOL. XV. 
Sept. 20th., 1934. By Bernard C. Cotton and F. K. Godfrey. Ill 
ural band of reddish-brown and white, more marked in the upper 
whorls; sometimes this band is infra-sutural, and it mav even 
be supra-sutural in the upper whorls and become infra-sutural 
in the lower. There may be in the upper whorls wide axial 
flames of short spiral white bars. The fine, crowded, oblique 
rust-brown longitudinal lines, are often hard to perceive on ac¬ 
count of the golden and violet iridescence. 
C. bellulus Dunker 1845 ( Trochus ). PI. 1, fig. 7. “The 
Elegant Cantharidus.” Imperforate, elongate-conic, acute, solid, 
polished; grayish or pinkish, with a few spiral red or orange 
lines, two on the penultimate whorl; the spaces between these 
lines marked with short white curved lines in pairs, often forming 
a figure 8-shaped pattern; whorls about eight, nearly flat, the 
last rounded at the periphery; spire attenuated toward the acute 
purplish apex; aperture small, contracted, sulcate and iridescent 
within; columella vertical, strongly toothed below. Height 15, 
diam. 7 mm. Beach, common, from Henley Beach (Gulf St. 
Vincent) to Fremantle (Western Australia); and dredged alive 
to 14 fathoms. (Type locality—South Australian coasts). A 
very attractive species. The interior of the mouth is more 
coarsely sulcate than in other species, showing only about six 
folds; outer and basal lips have a slight submarginal porcellanous 
subdentatc thickening, which stops a little short ol the upper 
termination of the outer lip. There are four colour varieties 
(though Trvon says the colour pattern is constant):—(a) The 
short white paired lines may be filled in with white so as to 
iorm white spots, (b) Or with a dark bull filling different 
from the tint of the rest of the shell, (c) The spaces between 
these spots may be oblique wide broken cream coloured bars, 
(d) The pairs of white lines immediately below the suture mav 
be twice as numerous as elsewhere. 
C. irisodontes Quoy & Gaimard 1834 ( Trochus) (— T. 
itjpdon Philippi: = T. laetus Philippi: = T. schrayeri Philippi: 
— T. virgulatus Philippi: = Monodonta virgata Menke: — T. 
minor Troschel). PI. I, fig. 8. “The Rainbow Cantharidus.” 
Imperforate, elongate-conic, pointed, solid, polished; yellowish, 
fink, or olive-green, with reddish or olive longitudinal lines in 
pairs, sometimes separate on the last whorl, and usually with 
numerous narrow, rather obscure spiral pink or yellowish lines; 
sometimes with a few series of white dots on the upper part, 
spire conic, shorter, less attenuated than in bellulus; whorls 
about seven, scarcely convex, .the last not carinate, finely striate 
beneath, smooth above; aperture rather large, often expanded, 
smooth inside, lined with intensely green nacre; columella strong¬ 
ly toothed below. Height 15, diam. 8 mm. Beach, very common, 
