940 REVISION OF THE MARINE MOLLUSCA OF NEW ZEALAND, 



Family. RissoiDiE.* 



RissoiNA (Eatoniella) olivacea. Hutton, (Dardania), Trans. 

 New Zealand Institute. Vol. XIV., p. 147, pi. 1, fig. k, (1882). 



Habitat. — Lyttleton. 



Shell ovate, smooth, very dai-k brown when dry ; aperture not 

 continuous. 



Length, 0-08 inch. 



RissoiNA ANNULATA. Hutton, New Zealand Jour, of Science. 

 Vol. II., p. 173 (1884). 



Habitat. — Auckland 



Shell ovate, smooth, brown, often with a paler band just below 

 the suture. Whorls 5, slightly rounded, the suture well marked. 

 Aperture rounded, continuous in the adult. 



Length, O'OS inch. 



Distinguished from B. purpurea by its shape and better marked 

 sutures. 



RissOA RUGULOSA. Hutton, Cat. Marine Moll, of New Zealand, 

 p. 28 (1873.) Eulima chathamensis, Hutton, I.e., p. 23. 



Habitat.— Throughout New Zealand and at the Chatham 

 Islands. According to Mr. Justice Gillies it is the same as B. 

 variegata, Angas, from Australia. 



Our largest species, elongately curved, white or yellowish white. 

 The spire whorls are longitudinally ribbed, but the body whorl is 

 smooth. 



Length, 0'3 inch. 



RissoA PURPUREA. Hutton, Cat. Marine Moll, of New Zealand, 

 p. 29 (1873.) H. subfusca, Hutton, I.e., p. 28. 



Habitat. — Stewart's Island. 



Shell siibulately elongated, yellowish with a purple spire, and a 

 white band below the suturs, apertures rounded, continuous. 



Length, 0-12 inch. 



The following species has been omitted : — 



Bissoa fasciata, Adams ; inhabits Australia. 



