26 
South A list ral ici u S hr II. 
S.A. NAT., VOL. XIV. 
November, 1932 . 
O. pupaeformis Sowerby 1865 {= O. kreffti Angas 1867). 
“The Pupa-like Odostomia.” Ovate oblong, white; axial ribs 
seven, valid, as wide as the interstices which are spirally striate; 
whorls nine, slightly convex; suture rather deep; mouth small, 
ovate, oblique; outer lip simple; columella with two folds, the 
higher rather conspicuous. Height 5.5 diam. ,75 mm. Dredged, 
Beachy:ort to Port Lincoln, 9-200 fathoms. Also Geraldton, 
Ellensbrook, Rottnest Island, Bunbury, W.A. (Type locality — 
New Caledonia). Rather variable. The costae may be con- 
tinued to the columella, and there may be a narrow spiral lira 
just above the suture between the ribs. Another form is without 
spiral striae. Others are shorter, whorls more convex, costae 
nine instead of seven and more sinuous, spiral threads much 
more numerous. This last form taken from beach, St. Francis 
Island, and King George Sound, W.A., and dredged to 55 
fathoms. 
O. simplex Angas 1871. “The Simple Odostomia ” Am- 
minately ovate, rather solid; whitish; smooth; whorls seven- 
and-a-half, rather flat, a little angulate at the suture; mouth 
subovate, lirate within; outer lip simple, with elevated striae 
within; columella with a single, sharp transverse fold. Height, 
4 diam. 1.5 mm. Dredged, Gulf St. Vincent, Investigator Strait, 
Backstairs Passage down to 19 fathoms. Also Geraldton, W.A. 
(Type locality — Port Jackson, N.S.W., dredged.) Thtre is a 
ventricose variant somewhat channelled at the suture, dredged 
Gulf St. Vincent and Cape Borda down to 55 fathoms. Another 
and smaller form, about 3 mm. with a diameter of 1 mm. 
showing spiral folds within the throat, taken on beach, King- 
ston, Tourville Bay, and dredged Beachport to St. Francis 
Island, 35-62 fathoms. 
O. auprasculpta Tenison-Woods 1877 (Rissoina) {~0, 
varians, Tate and May, 1900). “The Top-sculptured Odos- 
Tomia,“ in allusion to the peculiar sculpture on the top or upper 
portions of the whorls. Acuminately oval; whitish or translu- 
cent horn; spiral grooves, four, deep, narrow, irregularly spaced, 
the first three grooves are relatively wide, the fourth is a slender 
lincation sunk in the sutural canal; the first and second ligatures 
are broken up into blunt, straight, axial ridges, or studded with 
small granules (some translucent specimens are without sculpture 
save for faint spiral furrows on the body whorl); protocouch 
pellucid, smooth, papillary as a whole, forming a small lop-sided 
bend; adult whorls five, flatly convex; suture broad, deep; moutii 
oval; columella slightly arched, with a slender fold above; an 
