Hutton. — On new Land Shells. 137 



This genus includes Helix fatua, Pfr. (see Trans. N.Z. Inst., xiv., p. 153) 

 and the following species. 



Phrixgnathus marginatum, 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 5^-, flattened, sharply keeled; the first and a half 

 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-peduucles 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, sp. 110V. 



Shell depressed, striated, narrowly umbilicated ; 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. zealanclm, but less acutely keeled, more strongly striated 

 and differently coloured ; its generic position is doubtful. 



ZONITES (?) HELMSI, Sp. nOV. 



Shell depressed, umbilicated, finely ribbed, rather shining; colour horny- 

 brown, sometimes longitudinally banded or spotted with red-fuscous. Spire 

 convex, depressed obtuse ; whorls 5|- 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- 

 bilicus narrow, about one-seventh of the greatest diameter of the shell, 

 open, perforate : aperture oblique, Innately rotund ; peristome thin, regu- 

 larly arched, the columellar lip scarcely reflected. Greatest diameter 0-35, 

 least 0-3, height 0-23 inch. 



