112 
South Australian Shells. 
S.A. NAT., VOL. XV.. 
Sept. 20th , 1934. 
Gulf St. Vincent to Fremantle; common dredged alive to 10 fa¬ 
thoms, rare from 10 to 24 fathoms. (Type locality—South 
Australia). Colouration is variable. Some examples are uni¬ 
coloured green. The aperture is sometimes so dilated that the 
spire seems to lean to that side. Habitat, on seaweeds. 
C. nitidulus Philippi 1849 ( Trochus ). “The Brilliant Can- 
tharidusA Turreted-conical, smooth; shining, flesh-coloured, with 
spiral pale lines articulated with purple; whorls slightly convex,, 
the last two fifths the whole length, obtusely angular; sutures 
deep; aperture patulous, higher than wide, violaceous inside, 
iridescent and smooth; columella short, arcuate, terminating in 
a strong tooth. Height 13, diam. 9 mm. Not common. Gulf 
St. Vindent, dredged American River (Kangaroo Island) in sea¬ 
weed, 7-10 fathoms. Also Western Australia—Fremantle, but 
not typical. (Type locality—unknown. We designate American 
River, Kangaroo Island). The shell is steeple shaped, smooth 
and shining, thin; upon a flesh-coloured ground there are, on the 
upper surface, five whitish and purple-red articulated spiral lines, 
half as wide as their interspaces; on the base there are nine or 
ten similar lines: the smooth shining throat gives blue-violet re¬ 
flections; whorls seven to eight. Closely allied to C. insodontes. 
C. conicus Gray 1827 (Monoclonta) ( = Thalotia picta A. 
Adams 1851: =il/. turrit a Menke: = 7. tmodsiam Angas 1872* 
= T. troschelii Philippi: —Thalotia dubia Tenison-W oods 1877. 
a deformed conicus). “The Conical CantharidusA Imperfor¬ 
ate, elevated conical, solid; pinkish or grayish white with crim¬ 
son protoconch and numerous close longitudinal dark reddish- 
brown stripes, often cut into tessellations by the spiral grooves 
of the surface; spire straightly conical; apex acute; sutures linear; 
whorls about seven, nearly planulate, the last obtusely suban- 
gular at the periphery; whorls encipcled by lirae which are more 
cr less granose, five or six lirae on the early whorls, up to four¬ 
teen on the body whorl, and about six on the base; wrinkles of 
increment more or less prominent; columella straight, denticu¬ 
late, with prominent tooth at base. Height 18, diam. 13 mm. 
Beach, very common, all along the South Australian coastline; 
common dredged alive to 9 fathoms, less common to 15 fathoms. 
Also Western Australia—Albany, Geraldton. (Type locality— 
Western Australia). Rather variable in sculpture; the spaces 
between the spiral ribs often occupied by lirulae. The type of 
vsoodsiana Angas, is narrower than most examples of conicus 
Gray; the description corresponds exactly. 
C. neglectus Tate 1893 (Thalotia.). “The Diregarded Can¬ 
tharidusA This shell agrees with C. chlorostoma , with which 
it has been confounded, in its arcuate and truncated columella, 
