72 Transactions. — Zoology. 



Mangilia dictyota, Hutton. 



Huttou, Trans. N.Z. Inst., vol. xvii., p. 316, pi. xviii., 

 ficr 8 (1885); Pliocene Moll, of N.Z., Macleay Mem. 

 Vol., p. 53, pi. vii., fig. 37 (1893). 



Shell minute, elongato-fusiform, the whorls slightly angled 

 and cancellated. Longitudinal ribs narrow and distant, about 

 11 in a whorl. Spire-w4iorls with 3 strong distant spiral 

 ribs, the interstices finely spirally striated ; body-whorl with 

 about 9 spiral ribs, the posterior three larger and alternating 

 with a small rib as well as the spiral striae. Aperture oval, 

 nearly half the length of the shell ; posterior sinus broad and 

 shallow ; anterior canal moderate. 



Length, 6 mm. ; breadth, 3 mm. 



Described from a fossil shell of the Pliocene. 



Colour of shell white, sometimes light-brown. In some 

 specimens a brown band appears on the base of the penulti- 

 mate whorl, and is continued on the body-whorl. Columellar 

 lip mostly dark-violet or brown, especially the lower part of it. 

 The spiral sculpture is variable in its conspicuity. Animal 

 unknown . 



Type in the Canterbury Museum. 



Hab. Auckland Harbour (H. S.). Lyall Bay (A. Hamil- 

 ton). Foveaux Strait. Chatham Islands. 



This species is no doubt nearly allied to M. connectens, 

 Sow., and M. aispis, Sow., from South Austraha. 



Mangilia subaustralis, n. sp. Plate III., figs. 2, 2a. 



Shell fusiform, white, spire as long as the body- whorl. 

 Whorls 6iy, shouldered, longitudinally plicate and spirally 

 striate; the plicae, about 18 on the last whorl, are smooth, 

 between them equidistant cinguli, which are much closer 

 together from below the upper suture to the keel. Suture 

 impressed, submargined. Protoconch consisting of two minute 

 acute and smooth whorls. Aperture elongately oval, angled 

 above; outer lip thin, sharp, sinuated, with a shallow pos- 

 terior sinus near the suture, above the keel ; columella slightly 

 concave, with a very thin callus ; canal short, straight. 

 Animal unknown. 



Length, 11-5 mm. ; breadth, 4-5 mm. ; height of aperture, 



6 mm. 



Type in my collection. 



Hab. New Zealand ; exact locality unknown. One speci- 

 men only. 



This shell is very closely allied to M. australis, Ad. and 

 Aug., from Australia and Tasmania, which, however, is usually 

 larger ; the whorls are but indistinctly shouldered, the aper- 

 ture not angled above, and the anterior canal broader. 



