Mollusca.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 19 



cutting-points, the middle one largest. First marginal with 3 subequal denticles, 

 the second with 2 sharp minute hooks at the apex, the upper one with a number 

 of very small cutting-points. 



Type in the Canterbury Museum, Christchurch. 



Hfib. — Campbell Island, type (Professor Chilton) ; Auckland Islands (Captain 

 J. Bollons). Specimens from the latter locality are also in the British Museum. 



The species is named in honour of its discoverer. Professor C. Chilton, D.Sc, 

 M.A., M.B. 



Fam. OMALOGYRIDAE, Sars. 

 Genus Omalogyra, Jeffreys, 1860. 

 Distribution. — Europe, Greenland, and South Africa. 



Omalogyra bicarinata, Suter, 1908. 

 Omalogyra bicarinata, Suter, P. Mai. S., viii, 1908, p. 33, pi. iii, fig. 37. 

 Hob.— Snares Islands, in 50 fathoms (Captain J. Bollons). 



Fam. CERITHIIDAE, Fleming. 

 Genus Bittium, Gray, 1847. 

 Distribution. — Numerous species in temperate seas. 



Bittium retiferum, Suter, 1908. 

 Bittium retiferum, Suter, P. Mai. S., viii, 1908, p. 34, pi. iii, fig. 38. 

 Hab. — Snares Islands, in 50 fathoms (Captain J. Bollons). 



Fam. CERITHIOPSIDAE, H. and A. Adams. 

 Genus Cerithiopsis, Forbes and Hanley, 1853. 

 Distribution. — Mostly in northern and temperate seas. 



Cerithiopsis sarissa, Murdoch, 1905. 

 Cerithiopsis sarissa, Murdoch, T. N.Z.I. , xxxvii, 1904 (1905), p. 221, pi. vii, figs. 8, 9. 



Hab. — Near the Snares and Bounty Islands, in 50 fathoms (Captain J. Bollons). 



Also ofE Otago Heads, Banks Peninsula, Cook Strait, Kawhia Harbour, and 

 Whangaroa Harbour. 



Cerithiopsis crenistria, Suter, 1907. 

 Cerithiopsis crenistria, Suter, T.N.Z.I., xxxix, 1906 (1907), p. 256, pi. ix, fig. 4. 

 Hab. — Snares Islands, in 50 fathoms (Captain J. Bollons). 

 Also Hauraki Gulf. 



