18 
South Australian Shells. 
S.A* NAT , VOL. XV. 
Sept. 20th , 1934. 
at high tide mark. The type of B. purpurascea A. Adams is 
purple unicoloured; B. major A. Adams is the large, open ocean 
shell. 
Leiopyrga Ii. & A. Adams 1863. Umbilicate, elongated., 
narrow, somewhat turreted, thin; whorls convex, rounded, or 
carinated; aperture oval, small; columella arcuate, not truncated 
at base. Type— L. picturata H. & A. Adams 1863 = lineolaris 
Gould 1861. This genus differs from Bankkna notably in the 
possession of an umbilicus. Three recent species occur, L. I'm - 
eolaris Gould, L. cingulata Adams, and L. octona Tate, all Aus¬ 
tralian. Fossils recorded are L. quadricingulata Tate and 
sayceana Tate. 
L. lineolaris Gould 1861 ( Cantharidus) (= L . picturata 
H. Sc A. Adams 1863). “The .Lined Leiopyrga.” Narrowly 
umbilicate. turreted, slender, thin, shining; white, with longitud¬ 
inal undulating or zigzag, pinkish or purplish lines, often uniting 
to form spots at the periphery, or prominently angled there; 
sometimes with spiral bands at the periphery, and around the 
umbilicus; whorls about seven, convex, more or less carinated 
at the periphery, carina exserted above the suture, on the spire; 
base marked by distinct impressed concentric grooves; suture 
margined; aperture oval; outer lip thin; arcuate, not truncate, 
and slightly expanded above, but not covering the umbilicus. 
Height 8-12, diam. 5-7 mm. Gulf St. Vincent. Rare. (Type 
locality—Port Jackson, X.S.W.) We have not taken it. Adam’s 
type is from Port Jackson, where the species is well known. 
Angas reported is from Gulf St. Vincent, and Verco records it 
in M.S. notes as from South Australian waters. Colour variations, 
are much like those of Bankwia fasciata Menke:— 
1. A plain narrow zone encircles the middle of each whorl. 
2. The last whorl without the series of spots at the periphery.. 
3. A pale band encircles the middle of the last whorl, the lower 
portion being pinkish or closely spotted with pink. 
4. Uniform grayish violet, excepting the upper part of the spire 
and the umbilical region. 
The spiral sulcation and ridging is much more developed in 
some specimens than others. 
L. octona Tate 1891. PI. 1, fig. 7. “The Eight Circled 
Leiopyrga.” Turreted, narrowly umbilicate, thin, shining; white 
with oblique or axial zigzag pinkish lines; protoconch of two and 
a half turns, turbinately depressed, brown, smooth; adult whorls 
six and a half, moderately convex, separated by a linear suture; 
first two spire whorls smooth, the third showing faint spiral 
lines, which increase in strength, with the revolution of the spire; 
the anterior whorls with about eight to terr equal and equidistant 
rounded, and rather depressed cinguii,, which are ai little wider 
