S.A. NAT., VOL. XV. 
South 
Australian Shells. 
Ju 
\e 1 2 th, 1934. 
Rottnest . 
alt. 14.5 x 
21.5 mm 
— 
67.44% alt. 
Ellensbrook . 
20 x 
30 
— 
66.6 % 
,. . 
20 x 
28.5 
— 
70.0 % 
Esperance . 
20 x 
35 
57.0 % 
Albany . 
22 x 
34 
= 
64.7 % 
South Australia .... 
17 x 
27 
— 
63.0 % 
Victoria . 
17 x 
32 
— 
53.0 % 
Tasmania . 
17.5 x 
33 
— 
53.0 r l 
„ . 
17.5 x 
32.5 
— 
53.8 % 
South Australia .... 
16 x 
29 
— 
55.0 % 
Victoria . 
17 x 
31 
— 
55.0 
From the difference 
shown the 
Western 
Australian shell 
'may be named C. undatus occiduus subsp. nov. the type locality 
! being Esperance, Western Australia. Dimensions of the type— 
height 20, diam. 35 mm. (Reg. No. D 10966 S.A. Mus.) 
C. flagellatus Philippi 1848 ( Trockus ). PI. 1, fig. 3 (not 
C. florid us Philippi 1849, from New South Wales). Conoid, 
umbilicate, granulate; white, with branching stripes of reddish 
purple; whorls convex, the last rounded; base convex: white; 
penultimate whorl with six series of granules, the interstices wide 
as the ridges, obliquely striate; last whorl with eight series of 
granules above, nine on the base; columella oblique, solute above, 
the edges rugose-denticulate, terminating below in a pr> minent 
tooth; outer lip rugose and dentate within. Height 10, diam. 
15 mm. Common, on beach, at Guichen Bay, Rivoli Bay. and 
MacDonnell Bay; more or less on all ocean beaches from (fienelg 
River to Point Sinclair. Also Western Australia—Esperance 
Beach, and Albany; it does not appear to pass round the Leeuwin, 
as it has not been reported from the western shore of Western 
Australia. (Type locality—unknown. We designate Robe, Gui¬ 
chen Bay, South Australia). Whorls rather convex, especially 
above; last rounded, deflected anteriorly and flattened: white, 
with numerous dark rose-red radiating, sometimes branching- 
stripes above; base rather convex, with nine close granules^ iirae; 
granules on border of umbilicus but slightly developed. 
South Australian examples vary considerably in the depres¬ 
sion of the spire; in some the height is 69% of the greatest basal 
diameter, in others it is only 41%. 
Compared with C. limbatus Quoy & Gaimard, it is of a light¬ 
er colour, being white ornamented with rusty red, and the flames 
more marked just above the suture (in limbatus, just below); 
flagellatus is more depressed, the whorls more convex, instead of 
nearly straight and sloping; periphery also is more rounded, 
consisting of close set gemmules, well marked (the periphery of 
