Hutton. — On Bhaclriglossate Mollusca. 227 



Genus Fusus, Klein. 



Shell with a long and straight canal. Operculum with the nucleus 

 apical. 



Fusus spiralis, Adams, Proc. Zool. Soc, 1855, p. 221 [not of Tryon, 

 Man. Conch., hi., pi. 85, f. 593] ; F. pensum, Hutton, Cat. Marine Moll, of 

 N.Z.,p. 8 (1873). 



Hab. Cook Straits, rare. 



Whorls sub-carinated, spirally grooved ; the keel sub-nodulose ; suture 

 very deep. 



The operculum and dentition are unknown. 



Adams' description answers very well to our shell, which is not uncom- 

 mon as a fossil at Wanganui, but apparently very rare living. Tryon's 

 figure, however, does not at all agree with our shell, and if he has drawn 

 the type, F. spiralis must be struck off our list. 



Fusus australis, Quoy and Gaimard, Voy. Astrolabe, Zool. ii., p. 495, 

 pi. 34, f. 9-14 (1833) ; Gray, Figs. Moll. Anim., i., pi. 9, f. 3 ; Tryon, Man. 

 Conch., hi., pi. 34, f. 113. Fusus caudatus, Q. and G., I.e., ii., p. 503, pi. 

 34, f. 20, 21 ; Tryon, I.e., hi., pi. 34, f. 119. 



Hab. North Island and Nelson. 



Found also in Australia, Japan, and the Eed Sea. 



Whorls rounded, with spiral ribs and stria?, and longitudinal plications. 



The operculum and teeth are figured by Quoy, but the latter are not in 

 sufficient detail. 



This species somewhat resembles Siphonalia mandarinus, but is distin- 

 guished by its longer and straighter canal. 



Genus Taron, Hutton (1882). 



Shell fusiform ; canal short, slightly retroverted ; columella smooth ; 

 aperture oval, the outer lip simple : no posterior canal, operculum oval, the 

 nucleus sub-central. Dentition as in Leucozonia. 



Taron dubius, Hutton, Jour, de Conchyliologie, 1878, p. 13 (Trophon) 

 [not Leucozonia dubia, Petit]. 



Hab. Auckland. 



The body- whorl with twelve spiral ridges and usually nine or ten obso- 

 lete longitudinal ribs at the posterior end ; aperture more than half the 

 length of the shell. 



The operculum and dentition are figured in the Trans. N.Z. Inst., xv., 

 pi. xiii., f. e. 



This species seems near Fusus coreanicus, Smith (P.Z.S., 1879, pi. 20, 

 f. 36), from Japan, but differs from it in its shorter caual and longer 

 aperture, as well as in its colours, and in the spiral ribs not being 

 alternately smaller. 



