70 Transactions. — Zoology. 



deep. Aperture less than half the length of the shell, oval, 

 with the right lip flattened ; the posterior canal well marked ; 

 columella smooth and rounded ; the anterior canal very short; 

 right lip toothed within. 



Length, 10 mm. ; breadth, 4 mm. 



Type in the Canterbury Museum. 



Hab. Dunedin Harbour (A. Hamilton). Foveaux Strait. 



This species, described from Pliocene fossil shells, and 

 classed under Coluvibclla. has been obtained by dredging in 

 Dunedin Harbour and Foveaux Strait, and careful examina- 

 tion of a series of fossil and recent specimens has convinced 

 me that it really belongs to the Pleurotomidoi, and I think 

 its proper place is in the genus Surcula, although operculum 

 and dentition are unknown. Tiiere is a distinct posterior 

 sinus below the suture, shallow and rounded. 



Surcula verrucosa, n. sp. Plate III., figs. 1, la. 



Shell fusiform, turriculated, spire longer than the body- 

 whorl, yellowish-brown. Whorls 7, spirally striated, keeled 

 by a row of tubercles ; 2 to 3 spiral striae run across the 

 nodules, a rather broad one is situated below the suture ; 

 there are about 9 tubercles on the last whorl, and 6 to 7 strong 

 cinguli below them. Protoconch smooth, mammillary, con- 

 sisting of 1^ volutions. Suture impressed, margined. Aper- 

 ture oval ; outer lip thin, sharp, with a broad shallow pos- 

 terior sinus in front and above the nodules ; columella arched, 

 but slightly callous ; anterior canal short, almost straight. 

 Animal unknown. 



Length, 9-5 mm. ; breadth, 4 mm. ; height of aperture, 4 mm. 



Type in my collection. 



Hab. Foveaux Strait (A. Hamilton). 



This species resembles somewhat Driliia angasl, Ci'osse, 

 from Australia and Tasmania, which, however, is larger, with 

 a broader spire and very fine close spiral striae, the suture not 

 margined, and the posterior lip-sinus deeper and narrower. 

 From the Pliocene S. tuberculata, Kirk, which it also ap- 

 proaches somewhat, it may at once be distinguished by the 

 large much less numerous tubercles on the whorls and the 

 shorter anterior canal. 



Sub-family MANGILIIN^. 

 No operculum. 



Genus Mangilia (Leach, M.S.), Risso, em., 1826 {Mangelia). 



( = Bela, Leach, M.S.), Gray, Proc. Zool. Soc, 1847, 

 p. 134.) 



Shell fusiform, imperforate ; aperture oval-elongated, usu- 

 ally narrow, terminatmg in a rather short truncated canal ; 

 lip-sinus near the suture. Dentition, 1 — — 1. 



