OLEACINID, II 
4, flattish, rapidly increasing, the last hardly more rounded at the base, 
impressed in the middle; aperture oblique, lunately-oval; peristome 
simple, straight, basal margin slightly arched, reflexed above, adnate in 
the umbilical region. 
Diam., greatest, 38 ; least, -28 ; height, ;p4..* (Pir.) 
New Zealand. 
Wellington (F.W.H.) 
Pe tullia.: Gray; PZ.S.,. 1849, p. G05. Behn Lillia, Lif, 
MLV Col. 2, Dp. 25% Vol 5. 2: 255, La. 454 Kees fj. tA00., Shell 
imperforate, depressed, thin, closely-ribbed, diaphanous, tessellated 
with pale-yellow and rufous; spire slightly convex; whorls 5, rather 
convex, narrow, the last not descending, obscurely angled at the 
periphery, impressed in the middle at the base ; aperture sub-vertical, 
lunar ; peristome simple, straight, basal margin slightly arcuated. 
Diam., greatest, 18 ; least, 16; height, 08. (Pfr.) 
Auckland (Greenwood. ) 
b. Umbilicate. 
P. lambda, Pfeifer; P.Z.S., 1851; ILA.V.,, vol. 3, p. 84; vol. 5, 
p. 143, Wo. 653; Helix igniflua, Reeve, f- 774. Shell umbilicated, 
sub-conoidly-depressed, thin, somewhat smooth, now and then sculp- 
tured with spiral strize, slightly shining, diaphanous, fulvous, chestnut- 
spotted ; spire sub-conoidal, rather obtuse ; whorls 5, rather convex, the 
last not descending, obscurely angled at the periphery, convex beneath ; 
umbilicus moderat, conical; aperture oblique. lunately-rotund, within 
shining ; peristome simple, straight, margins closely united, columellar 
margin sub-dilated above, expanded. 
Diam., greatest, ‘51 ; least, ‘43; height, -28. (Pfr.) 
New Zealand. ; 
P. biconcava, Pfeffer; P.Z.S., 1851; M.A.V., vol. 3, p. 109; 
vol. 5, p. 173, Wo. 917; Reeve, f 810. Shell umbilicated, depressed 
closely arcuately-ribbed, opaque, horny-yellowish, rufously streaked ; 
spire concave ; whorls 4%-5, narrow, the last but one convex, the 
last rounded, not descending; umbilicus broad, perspective ; aperture 
sub-vertical, higher than broad, lunar ; peristome simple, straight, right 
margin sub-arcuated in front. 
Diam., greatest, ‘2; least, ‘17; height, ‘o8. (Pfr.) 
New Zealand (Strange.) 
Wellington (F.W.H.) 
Sub-Family— Vitrinine. 
Animal too large entirely to enter the shell. Mantle margin more 
or less produced, reflected over the sides, or sometimes entirely covering 
the shell. Tail often obliquely truncate, but not furnished with a 
caudal gland. Shell thin, usually horny and transparent: aperture very 
wide. 
Genus, VITRINA—Draparnaud. 
Mantle with the front edge greatly extended, and covering the neck 
often as far as the tentacles. ‘Tail very short, shell pellucid ; whorls 
