S.A. . NAT.* VOL. XV. 
June 12th/1934. South Australian Shells. 83. 
aperture constricted by the very noticeable contraction of the 
body whorl at the outer lip, outer lip dentate within, highest 
tooth very large. Height 13, diam. 18 mm. Rare, Levens 
Beach, typical (Cotton); Western Australia—not uncommon, 
Rottnest Island, Elletisbrook, Albany. (Type locality—New 
Holland). The species is moderately flatly conic, the flve whorls 
somewhat swollen, the last moderately angular, each whorl with 
five to six series of tubercles, the lowest tubercle standing upon 
the angle of last whorl; base mpderately flat with five rows of 
grains; mouth rather strongly contracted for the genus; outer 
lip thickened within, uppermost tooth wide, blunt, strongly pro¬ 
jecting; umbilicus very widely open and at border moderately 
strongly toothed; colour is rosy red. or reddish brown spots upon 
a white ground; base pure white. 
Allied to C. maxillatiis Menke, but differs in the deeper 
umbilicus, the smooth not tubercular edge of the columella, the 
stronger development of the teeth, more distinct granulation, and 
the very contracted aperture. The mouth is almost horizontal, 
the umbilicus and mouth are both narrower than in C. viaxillatus. 
C. euchelioides Tate 1893. PI. 1, fig. 1. Turbinately con¬ 
oid, somewhat solid; opaque, reddish; cinguli three, on early 
whorls, the posterior cingulus being the smallest; penultimate 
whorl with a riblet between anterior suture and first cingulus, 
between first and second, and second and third cinguli; last whorl 
with seven cinguli on upper surface and interposed riblets here 
and there; base with seven cinguli, with an interposed riblet in 
the one or two exterior sulci: no conspicuous rib margining the 
umbilical area; whole surface of shell (except the protoconch) 
is sculptured with fine close oblique striae, which pass over the 
principal cinguli, which occasionally show a tendency to granula¬ 
tion; whorls about six (including the protoconch), separated by 
a canaliculate suture and flattened posteriorly, last whorl con¬ 
vex in the anterior third; base flatly convex, falsely umbilicate, 
the columella entering the umbilical depression, which is shallow 
and moderately narrow; aperture oblique, rhomboid-oval; outer 
lip slightly depressed at suture; outer and basal margins thin, 
lirate, and iridescent within; columella oblique, rib-like, with an 
attenuated keel elevated into a tooth-like prominence at base, 
and separated from the basal margin of the aperture by a deep 
notch. Operculum multispiral. Height 6.25, diam. map 6.5, 
min. 5.75 mm. Living at low tide mark, under stones, Moonta 
Bay (type locality); also dredged at many stations^ South Aus¬ 
tralia and Western Australia, alive to 30 fathoms, and dead shells 
only to 200 fathoms. The animal has the foot white below; 
