80 
South Australian Shells. 
S.A. NAT., VOL. XIV 
May, 1933 
I‘?romiiient, deeply entering folds, the lower larger and projectine 
beyond the canal. Height 5, diam. 3.5 mm. Dredged — Beach- 
port to Cape Jaffa, 90-300 fathoms. Type locality — 100 fathoms, 
forty miles south of Cape Wiles, South Australia). South Aus- 
tralian adult specimens have a prominent ndangular tooth inside- 
the outer lip op['osite the interval between the columcllar folds., 
and a long Inflected edge iurther back, and a minute denticle- 
between the two, also a low, wide, basal tubercle on body whorl 
midway between the upper fold and the back of the aperture. 
\ounger shells are thinner, without the labral denticle and the 
basal uiberclc is almost obsolete. 
R. denticulata Gould 1860. “I'he Denticulated Ringicu- 
laT Ovate, acuminate, solids milk-white, spiral striae, close 
(narrower ones being sometimes intercolated) ; whorls five, ven- 
tricose; mouth narrow; lip thickened, denticulate within, nearly 
interrupted at siphonal sinus, folds transverse, acute, callus mod- 
erately, Iiardly appressed, the parietal tooth moderate. Height 
5, diam. 3.5 mm. Dredged — Neptune Islands, 104 fathoms. Also 
Western Australia — West of Eucla, 50-100 fathoms, and Man- 
durah. (Tv|'e locality — Port Jackson). 
R. hardingi sp. nov. PI. 1, fig. 8. "‘Harding's Ringicula.'" 
Ovate, turreled, solid, Aehite; spiral incisions strong, numerous,, 
crowded, abcniL thirty in the body whorl, with one stronger spiral 
just below the suture; spire somewhat elevated; protoconch of 
two whorls, slightly turreted. somewhat oblique, smooth; adult 
whorls three, slightly convex; moutli rather narrow, obliquely 
oA'atc; outci' lip thickened, smooth; two columellar and one parietal 
fold. Pype — Height 4. diam. 2.5 mm. Locality — 130 fathoms 
off Cape Jaffa S.A. (Reg. No. D. 10662 S. Aus. Mus.) Spire 
turreted, shorter than in R. australis Hinds, and longer than in 
R. si'miscidpta Hedlcy. The strong spiral below the suture Avllf 
Iselp to distinguish it. Named after Mr. W. A. Harding, an ardent 
microscopist. Chairman of the Microscope Committee, a sub- 
section of the South Australian Field Naturalists. 
Pugnus Hedley 18%. “liy its thrice folded columella, an- 
terior canal, thickened outer lip. a sculpture of spiral grooves 
crossed by transverse striae, this very distinct genus takes a 
place in the family Ringiculidae. From the only other sur- 
viving genus Rin!s,iciiia, Pugnus is separated by its iuvolule shell 
and buried spire. In the shortness of the spire the Cretaceous 
fossil Avellana occupies a position intermediate between tliesc- 
two. Its contour is however, more globose, and those subordin- 
ate groups which agree with Pugnus In possessing a smooth lip,, 
appear to differ by having one columella plication only. The- 
type and only species is P. parvus Hedley'^ (Hedley). 
