IX 
backwards, columellar margin callously-reflected above, almost concealing 
the perforation. 
Diain., greatest, ; least, 1\ ; height, 5 mill. 
Hab., New Zealand (Strange). 
HELIX (CHAROPA) HYPOPOLIA, Pfeiffer. 
Helix hypopolia, Pfr., P.Z.S., 1851 ; M.H.Y., vol. 3, p. 68;# vol. 5, 
p. 114, No. 459. 
Shell very narrowly umbilicated, depressed, thin, very closely ribbed, 
silky, horny-cinereous ; spire little elevated, convex ; whorls 5J, slightly 
convex, the last not descending, more convex at the base ; aperture a 
little oblique, broadly lunar; peristome simple, straight, columellar 
margin arcuated, slightly reflexed above. 
Diam., greatest, 6^ ; least, 6 ; height, 3$ mill. 
Hab., New Zealand (Strange). 
HELIX DECIDHA, Pfeiffer. 
Helix decidua, Pfr., P.Z.S., 1857, p. 108; M.H.Y., vol. 4, p. 71, vol. 5, 
p. 137, No. 006. 
Shell umbilicated, depressly-turbinated, thin, sculptured with mem¬ 
branaceous, deciduous, fine ribs, horny-yellowish, obscurely and 
angularly streaked with reddish ; spire somewhat regularly conoidal; 
whorls 5, rather convex, slowly increasing, the last not descending, 
sub-angulated at the periphery ; umbilicus narrow, pervious; aperture 
oblique, lunately-rotund; peristome simple, straight, margins converging, 
columellar margin slightly expanded. 
Diam., greatest, 31, ; least, 3|-; height, 2 mill. 
Hab., New Zealand. 
HELIX (PARYPHANTA) LAMBDA, Pfeiffer. 
Helix lambda, Pfr., P.Z.S., 1851; M.H.Y., vol. 3. p. 84 ; vol. 5, p. 143, 
No. 653. Nanina lambda, Gray. Helix igniflua, Reeve. 
Shell umbilicated, sub-conoidly-depressed, thin, somewhat smooth, now 
and then sculptured with spiral strise, 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 moderate, conical; aperture oblique, lunately- 
rotund, within shining; peristome simple, straight, margins closely 
united, columellar margin sub-dilated above, expanded. 
Diam., greatest, 13 ; least, 11; height 7 mill. 
Hab., New Zealand. 
HELIX CORNEO-FULYA, Pfeiffer. 
Helix comeo-falva, Pfr., Malak. Bl., viii., 1861 ; M.H.Y., vol. 5, 
p. 145, No. 673. 
Shell umbilicated, sub-orbicular, depressed, thin, faintly finely striated, 
most distinct at the suture, shining, pellucid, horny-fulvous; spire 
