82 . 
S.A. NAT., VOL. XV. 
South Australian Shells. June 12th, 1934, 
C. maxillatus Menke 1843 (Monodonta). Orbiculate con¬ 
vex; pale brown, obscurely punctate-articulate, or black; trans¬ 
versely granulate-cingulate; cinguli, above six, granose, beneath 
seven, smooth; whorls nearly plane, the -last subangular; base 
plane; umbilical cavity with crenate margin; aperture rhomboidal, 
gaping; outer lip with,, six teeth, the upper one largest;- basal 
tooth of columella large, obtuse, ‘bifid, three on the columellar 
margin. Height 6, diam. 9 mm. Uncommon, beach. Norman- 
ville, Port Willunga, Pondolowie, Beard’s Peninsula, Encounter 
Bay, Point Sinclair, St. Francis Island. (Type locality—West¬ 
ern Coast Australia). 
C. anus Philippi 1848. Shell low conic, solid, subangulate 
at periphery, with a rather wide umbilical excavation, whitish 
maculated with brown below the sutures, the remainder of the 
shell tessellated black and white, pinkish or yellowish toward the 
apex; whorls 5-6, somewhat convex, spirally granose lirate, the 
lirae 5 or 6 on the penultimate, 12 or 13 on the last whorl of 
which the sixth is at the periphery; the finely beaded lirae are 
separated by minutely spirally and obliquelv striated interstices 
as wide as the ridges; the body whorl is a little deflected anter¬ 
iorly, flattened and excavated in the centre beneath; the aperture 
is contracted, very oblique, tetragonal; the upper lip is straight 
with a strong tooth midway between its insertion and the outer 
angle of the aperture; the outer and basal lips are well curved, 
thickened and plicate denticulate within; the columella is very 
oblique, its edge reflexed, and bearing 4 or 5 large tubercles,, 
one at its insertion; terminative below in a strong quadrangular 
bifid tooth; parietal tract bearing strong white wrinkles; umbili¬ 
cal excavation penetrating but little deeper than the insertion of 
the columella; its border plicate denticulate. Height 9-11, diam. 
12-15 mm. (Australia). T. limb at us is more strictly conical 
with less developed teeth than anus, and has a more deeply 
perforating umbilicus. We designate type locality King George’s 
Sound, \\ estem Australia. Beard’s Peninsula, Normanville, A1- 
dinga. Encounter Bay, Point Sinclair, uncommon. At St. Fran¬ 
cis Island, Venus Bay, Murat Bay, it is common and more com¬ 
mon to the West. 
C„ personaius Philippi 1847 ( Trochus ). PI. 1 , fig. 8 ( = 
Monodonta ringens Philippi 1846, not M. ringens Menke 1843). 
1 he Masked Clanculus.” Depressed conic; white, dotted with 
rosy or rusty spots; ornamented with rows of granules (five in the 
penultimate whorl), last whorl angulated; base markedly and 
beautifully sculptured with tubercles in five series; umbilicus- 
with crenate margin; columella ending in a valid tooth at base; 
