Hourron—Tkhe Phocene Mollusca of New Zealand. 19 
PLEUROTOMA ALBULA, Hutton, Cat. Marine Moll. of N.Z. p. 12; P. antipodum, Ki. A. 
Smith, Ann. and Mag. of Nat. Hist. 1877, Vol. XIX. p. 491. 
(Plate vi. fig. 22.) 
Shell small, fusiform. Whorls spirally grooved and with a central prominent 
spiral rib. Aperture oblong, contracted below ; canal short, recurved. Length 
10mm.; breadth 4mm. 
Locality.—Petane, Matapiro. 
Pievroroma Nexiuis, Hutton, Trans. N.Z. Inst. Vol. XVII. p. 317, pl. xvi. fig. 9. 
(Plate vi. fig. 23.) 
Shell minute, fusiform, cancellated. Whorls 6, the two first embryonic, the 
others angled. Those of the spire with a promiment spiral keel crossed by rather 
oblique spiral threads forming an obtuse angle on the keel. Suture margined. 
Body whorl with 8 or 9 spiral ribs, the first and third larger than the others ; 
all, after the sixth, very close together on the canal; these are crossed by rather 
distant longitudinal lines which form a very obtuse angle on the first spiral rib 
or keel. Aperture less than half the length of the shell, rather constricted and 
angled behind ; columella straight, produced into a short eanal. Length 4mm. 
Locality.—Wanganui, Petane. 
PLevROTOMA CHEESEMANI, Hutton, Jour. de Conch. 1878, p. 16; P. zealandica, Smith, 
Ann. and Mag. Nat. Hist. 1877, Vol. XIX. p. 492 (not of Reeve). 
(Plate vr. fig. 24.) 
Shell ovato-fusiform, the spire gradated. Spire whorls smooth in front, 
obliquely striated behind. Body whorl as long as the spire, contracted towards 
the base ; a smooth band at the sinus behind which it is obliquely striated and 
in front spirally ribbed, the interstices finely longitudinally striated; 9 or 10 ribs 
on the outer lip in front of the smooth band. Canal short, recurved. — Length 
20mm.; breadth 9mm. 
Locality.—Wanganui, Petane. 
Pievrotoma prorensa, Hutton, Trans. N.Z. Inst. Vol. XVII. p. 317 (Daphuella). 
(Plate vr. fig. 25.) 
Shell small, elongato-fusiform, with the spire longer than the body whorl. 
Whorls ornamented with delicate spiral threads crossed by growth lines, those of 
G 
