6 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Subgen. Altania, Eisso, 1826. 



Sect. ALViNiA, Monts., 1884. 



10. EissoiA PLiCATA, Hutton. 



Rissoa plicata. Hutton : Cat. Mar. Moll. New Zealand, 1873, p. 29. 

 Rinsoina plicata, Hutton: Man. New Zealand Moll., 1880, p. 80. 

 £glisia plicata, Hutton: Proc. Linn. Soc. New iSouth Wales, vol. ix 



(1885), p. 939 ; Tryon, Man. Conch., ser. i, vol. ix, p. 86. 

 Rissoa [Alvania ?) cheilontoma, Tenison-Woods : Proc. Roy. Soc. 



Tasmania, 1876 (1877), p 152. 

 Rissoia {Alvinia) cheilostoma, Tenison- Woods : Tryon, Man. Conch., 



ser. I, vol. ix, p. 366, pi. Ixviii, 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. 3 mm. 



Hah. — Auckland (in Canterbury Museum) ; Stewart Island 

 (A. Hamilton) ; Tasmania. 



Yar. LyaUiana, 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. 



Hal. — Lyall Bay, near Wellington (A. Hamilton). 



Type in my collection. 



Genus EISSOINA, D'Orb., 1840. 



Sect. RISSOINA, s.s. 

 11. RlSSOINA EIIGIFLOSA (Huttou). 



Rissoa rugulosa, Hutton : Cat. Mar. Moll. New Zealand, 1873, p. 28 ; 



Proc. Liim. Soc. New South Wales, vol. ix (1885), p. 940 ; 



Macleay Memorial Yolume (1893), p. 64, pi. viii, fig. 63. 

 Rissoina rugulosa, Hutton: Man. New Zealand Moll., 1880, p. 80. 

 Eulima Chatliamensis, Hutton: Cat. Mar. Moll. New Zealand, 1873, 



p. 23; Man. New Zealand Moll., 1880, p. 73. 



Shell elongated, conic, yellowish- or greyish-bi'own, apex white ; 

 whorls 7-8, flatly rounded, with longitudinal rounded ribs, 15-16 

 on the penultimate whorl, and numerous fine spiral striae, most 

 conspicuous on the body- whorl, on which the longitudinal ribs become 

 obsolete on approaching the aperture, and at the base; aperture ovate, 

 outer lip white, mouth purple inside, peristome continuous. Opercu- 

 lum unknown. Long. 7*5, lat. 3mm. 



