SUTER: NEW ZEALAND RISSOIIDA®. 6 
Subgen. Atvanta, Risso, 1826. 
Sect. auvrnta, Monts., 1884. 
10. Rissora pricata, Hutton. 
Rissoa plicata, Hutton: Cat. Mar. Moll. New Zealand, 1878, p. 29. 
Rissoina plicata, Hutton: Man. New Zealand Moll., 1880, p. 80. 
Figlisia plicata, Hutton : Proc. Linn. Soc. New South Wales, vol. ix 
(1885), p. 989; Tryon, Man. Conch., ser. 1, vol. ix, p. 86. 
Rissoa (Alvania ?) cheilostoma, ‘Tenison-Woods: Proc. Roy. Soc. 
Tasmania, 1876 (1877), p. 152. 
Rissoia (Alvinia) chetlostoma, Tenison-Woods: Tryon, Man. Conch., 
ser. I, vol. ix, p. 366, pl. lxviil, fig. 91. 
Shell imperforate, solid, dull, yellowish, clathrated by longitudinal 
and spiral ribs, the former becoming obsolete at the periphery, the 
latter continued and more conspicuous on the base; whorls 7, with 
deep, lirate, suture; aperture conspicuously bilabiate. Long. 3mm. 
Hab. — Auckland (in Canterbury Museum); Stewart Island 
(A. Hamilton); Tasmania. 
Var. Lyalliana, n.var. 
Shell cinereous or rufous, occasionally yellowish-white, slightly 
shorter, less distinctly clathrated, the spiral ribs being more noticeable ; 
the whorls are more shouldered, and the first spiral rib is at a greater 
distance from the suture. 
Hab.—Lyall Bay, near Wellington (A. Hamilton). 
Type in my collection. 
Genus RISSOINA, D’Orb., 1840. 
Sect. RISSOINA, 5.8. 
11. Rissorva RuGuLosa (Hutton). 
Rissoa rugulosa, Hutton: Cat. Mar. Moll. New Zealand, 1873, p. 28; 
Proc, Linn. Soc. New South Wales, vol. ix (1885), p. 940; 
Macleay Memorial Volume (1893), p. 64, pl. vin, fig. 63. 
Rissoina rugulosa, Hutton: Man. New Zealand Moll., 1880, p. 80. 
Eulina Chathamensis, Hutton: Cat. Mar. Moll. New Zealand, 1873, 
p. 23; Man. New Zealand Moll., 1889, p. 73. 
Shell elongated, conic, yellowish- or greyish-brown, apex white ; 
whorls 7-8, flatly rounded, with longitudinal rounded ribs, ih 
on the penultimate whorl, and numerous fine” spiral strie, mos 
conspicuous on the body-whorl, on which the longitudinal ribs splice 
obsolete on approaching the aperture, and at the base; pair ovate, 
outer lip white, mouth purple inside, peristome continuous. Opercu- 
lum unknown. Long. 7°5, lat. 3mm. 
