198 Transactions.— Zoology. 
P. rrraxia, Hutton (1883). 
Spire conoidal, rather obtuse; suture margined ; periphery obtusely 
angled.- Pale horny 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, Reeve (1852); H. omega, Pfeiffer (1851). 
Imperforate, depressed. Horny, without markings. Diameter ‘8 inch. 
Dentition, 35-1-85. 
North Island.—Petane, near Napier; Wellington (E. W.EL.). 
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. zepra, 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 (R. 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 (1888). 
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). 
