198 Transactions. — Zooloijy. 



P. titania, Hutton (1883). 



Spire couoidal, rather obtuse ; suture margined ; periphery obtusely 

 angled. Pale homy irregularly banded with chestnut. Diameter *14 inch. 



South Island.— Dunedin (F.W.H.). 



P. haasti, Hutton (1883). 



Spire conoidal, depressed ; suture impressed ; periphery sub-carinated. 

 Horny with irregular bands of reddish-brown and white. Diameter 

 •12 inch. 



South Island. — Mount Somers (Haast). 



Genus Amphidoxa, Albers. 



Shell depressed, thin, pellucid ; periphery usually rounded ; whorls 3 to 

 4, rapidly increasing ; aperture very oblique. Mantle reflected over the 

 peristome of the shell, with an even margin : tail depressed. 



A. Smooth, polished. 



A. compressivoluta, Eeeve (1852) ; H. omega, Pfeiffer (1851). 



Imperforate, depressed. Horny, without markings. Diameter -3 inch. 

 Dentition, 35-1-35. 



North Island. — Petane, near Napier ; Wellington (F.W.H.). 



South Island. — Greymouth (Helms). 



A. cornea, Hutton (1882). 



Smaller than the last, the whorls more convex. Diameter *25 inch. 

 Dentition, 22-1-22. 



North Island. — Auckland (Cheeseman, Gillies). 



A. zebra, Guillon (1842); H. phlogophora, Pfeiffer (1849); H. flam- 

 migera, Pfeiffer (1852) ; H. multilimbata, Hombron and Jacquinot (1854). 



Umbilicus very narrow or covered. Pale yellow horny with dark red- 

 dish brown undulating bands. Diameter -25 inch. Dentition, 21-1-21. 



North Island.— Wellington (T. W. Kirk). 



South Island. — Greymouth (Helms) ; Oxford (Chilton) ; Banks Penin- 

 sula (E. Brown). 



Auckland Islands (British Museum). 



A. jacquenetta, Hutton (1883). 



Umbilicus very narrow. Periphery sharply angled. Horny brown, 

 without markings. Diameter '2 inch. Dentition, 28-1-28. 



South Island. — Greymouth (Helms). 



A. perdita, Hutton (1883). 



Umbilicus narrow ; spire convex, smooth. Horny without markings. 

 Diameter -23 inch. Dentition, 20-1-20. 



North Island. — Auckland (Cheeseman, Gillies) ; Wanganui and Wel- 

 lington (T. W. Kirk). 



South Island. — Greymouth (Helms). 



