Hurron.—On new Land Shells. 137 
This genus includes Helia fatua, Pfr. (see Trans. N.Z. Inst., xiv., p. 153) 
and the following species. 
PHRIXGNATHUS MARGINATUS, Sp. NOV. 
Shell small, conical, umbilicated, striated: colour pale horny-brown 
regularly longitudinally banded with reddish-fulvous, the fulvous bands 
becoming obsolete near the mouth, base pale horny-brown. Spire conical, 
slightly acute; whorls 54, flattened, sharply keeled; the first and a helt 
whorls smooth, but spirally striated, the rest longitudinally striated with 
growth-lines; base slightly convex, radiately striated, and very delicately 
spirally striatulated; periphery sharply keeled; suture marginated; umbili- 
cus narrow, about one-tenth of the diameter: aperture vertical, rhomboidal ; 
peristome thin, the outer and inner margins nearly parallel, columellar mar- 
gin slightly reflected. Greatest diameter 0-15, least 0-13 ; height 0:1 inch. 
Animal small, eye-peduncles long, the tentacles moderate; body elon- 
gate, foot slightly produced behind beyond the shell. Colour pale-yellowish ; 
peduncles, a stripe on each side of the head, and another short stripe in the 
middle on each side of the foot purplish gray. Dentition, 40—1—40. 
Hab. Greymouth (Mr. R. Helms). 
Sec. OXYGNATHA. 
THALASSIA (?) PROPINQUA, $p. nov. 
Shell depressed, striated, narrowly umbilieated ; colour pale-horny with 
numerous narrow zig-zag red bands, which are often broken up into a series 
of spots. Spire convexly conoidal, apex obtuse; whorls 4—5, rather flat- 
tened, the first two smooth, the rest very strongly striated with oblique 
growth-lines; last whorl carinated, the base rounded; suture impressed: 
umbilicus narrow : aperture oblique, rotundly lunate, anteriorly subangled; 
peristome thin, the columellar margin reflected. Greatest diameter 0°24 
least 0-2, height 0-16 inch. Dentition, 21-1-21. 
Hab. Weka Pass (C. Chilton). 
Allied to T. zealandie, but less acutely keeled, more strongly striated 
and differently coloured ; its generic position is doubtful. 
ZowrrES (?) HELMSI, sp. nov. 
Bhell depressed, umbilicated, finely ribbed, rather shining; colour horny- 
brown, sometimes longitudinally banded or spotted with red-fuscous. Spire 
convex, depressed obtuse ; whorls 54-6, slowly increasing, rounded, broader 
than high, ornamented with thin rather distant ribs, about 10 to 15 in the 
tenth of an inch, the insterstices finely reticulated ; suture impressed ; um- 
bilieus narrow, about one-seventh of the greatest diameter of the shell, 
open, perforate: aperture oblique, lunately rotund; peristome thin, regu- 
larly arched, the columellar lip scarcely reflected. Greatest diameter 0-35, 
least 0°3, height 0-23 inch. 
