3 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
young specimens the riblets are continued below the spiral thread to 
the umbilical region. Aperture vertical, rotundly ovate, continuous, 
outer and basal margins sharp, columella somewhat thickened, rufous, 
rather concave, subtruncate at the base. Operculum not seen, 
Long. 2°5, lat. 1:5 mm. . 
Hab.—Lyall Bay, near Wellington. It was found by Mr. A, 
Hamilton of Dunedin, whose name I have much pleasure in uniting 
with the species. 
Type in my collection. 
Subgen. Sapanma, Leach, 1847. 
8. Rissora rncipata (Frauenfeld). 
Sabanea incidata, Frauenfeld: Novara-Exped., Zool. vol. 1, Mollusca, 
p. 12, pl. u, fig. 29. 
Rissoia (Sabanea) ineidata, Frauenfeld: Tryon, Man. Conch., ser. 1, 
vol. ix, p. 389, pl. Ixiu, fig. 65. 
Shell conoidal, thick, smooth, brownish ; whorls 5, flattened, suture 
and periphery channelled; lp thickened. 
Hab.— Botany Bay (Frauenfeld). 
I found several specimens of this interesting little shell on sea- 
weeds at Te Onepoto, near Sumner. The length of my specimens 
is 1:°25mm.; Frauenfeld gives 1:4 mm. 
4. Risso1a annutata, Hutton. 
hissoa annulata, Hutton: New Zealand Journ. Science, vol. ii (1884), 
p. 178; Proc. Linn. Soc. New South Wales, vol. ix 
(1885), p. 940; Macleay Memorial Volume (1893), p. 65, 
pl. viii, fig. 67. 
Shell ovate, smooth, brown, often with a paler band just below 
the suture; whorls 5, slightly rounded, suture well-marked; aperture 
rounded, continuous in the adult. The operculum is corneous and 
paucispiral, without any internal process. Specimens from Lyttelton 
measure: long. 2:25, lat. 1:25 mm. 
Hab.—Auckland; Lyttelton, under stones between tide-marks ; 
Pliocene of Wanganui and Petane (Hutton). 
Type in the Canterbury Museum, Christchurch. 
The species may be distinguished from R. subfusca by its shape and 
more strongly marked suture. 
Var. minor, n.var. 
Smaller than the typical form, suture more impressed, polished. 
Long. 1°5, lat. 75 ane ' x ms 
Hab.—Foveaux Strait (A. Hamilton), 
Type in my collection. 
