OLEACINID. 9 
Diam., greatest, ‘17 ; least, ‘16; height, ‘1. (Pfr.) 
Auckland (Sinclair and Greenwood.) 
Distinguished by its spiral grooves. 
B. Upper surface flat or concave. 
P. obnubila, Reeve, 7c, Wo. 792, pl. 130; Er. vol. 3, p. 633; 
vol. 5, p. 164, LVo. 844; Helix sigma, Pfr. Shell umbilicated, depressed, 
intensely fuscous, throughout decussated with impressed spiral furrows 
and oblique strize; spire depressed; suture distinct ; whorls 5, flatly- 
convex, the last rounded ; aperture lunar; peristome simple, acute. 
Everahit -r4.. (Pit) 
New Zealand. 
Distinguished by its spiral grooves. 
P. anguiculus, Reeve, Z.c., No. 802, pl. 131 ; Pfr, M-H.V., vol. 
3, Pp. 6343 vol. 5, p. 173, LVo. 920. Shell umbilicated, depressed, 
sub-discoidal, brownish, adorned with sub-remote rufous streaks ; 
suture of the spire impressed ; whorls 5, rotundate, longitudinally very 
finely striated with rib-like striae; aperture sub-circular; peristome 
thin, margins closely united. 
Bieight,“1.. (Per. ) 
New Zealand. 
P. ide, Gray; P.Z.S., 1849, ~. 166; Pfr, M.A.V., vol. 3, p. 108 ; 
vol. 5, p. 172, Wo. 911; Reeve, f, 789. Shell umbilicated, depressed, 
thin, arcuately-ribbed, pilose, pale horny, radiated with brown ; spire 
flat, sub-impressed in the middle; suture impressed ; whorls 5%, rather 
convex, slowly increasing, the last somewhat rounded, not descending ; 
umbilicus moderate, pervious; aperture slightly oblique, rotundately- 
lunar; peristome simple, straight, margins very remote, columellar 
margin short, greatly arched. 
Diam., greatest, °32; least, ‘28 ; height, almost ‘16. (Pfr.) 
Auckland (Major Greenwood.) 
Pe etas Feijen ZS Bost AL. VS w0l! 355 PA to] 5 olan: 
173, Vo. 922; H. corniculum; Reeve, f. 826. Shell umbilicated, 
‘depressed, finely striated with rib-like striz, silky, waxen ; spire flattish ; 
suture impressed ; whorls 4, slightly convex, the last more broad, not 
descending, depressed; umbilicus rather broad, perspective ; aperture a 
little oblique, lunately sub-circular ; peristome simple, straight, margins 
closely united. 
Diam., greatest, ‘12; least, ‘1; height, ‘o5. (Pfr.) 
New Zealand (Strange.) 
P. zeta, Lefer; P-ZS., 1851; M7.V., vol. 3, p. 109; vol. 5, p. 
173, Vo. 919; Helix infecta, Reeve, f. 808. Shell very broadly umbilica- 
ted, depressed, sub-discoidal, rather solid, somewhat closely strongly 
plaited, not shining, pale yellowish, tessellated with large chestnut spots ; 
spire flat, submersed in the middle; suture deep; whorls 5%, very 
narrow, convex, rather swollen, the last not descending, somewhat 
